American Public Opinion Polls: Opinion Toward the 2015 Iran Deal and Aftermath

Note: We are presenting raw data. To analyze the data, we encourage users to read the entire study and the methodology used. Sample size, question wording, and question order can affect results and reliability. Context and timing may also influence responses, for example, if the survey is conducted during a war.

Do you think Iran is a regional sponsor of terror in the Middle East or not? (Harvard CAPS/Harris Poll, October 11-13, 2024)

Do you support or oppose Israel striking Iranian oil fields in retaliation for Iran's recent attack? (Harvard CAPS/Harris Poll, October 11-13, 2024)

Do you support or oppose Israel striking the Iranian nuclear weapons program in retaliation for Iran's recent attack? (Harvard CAPS/Harris Poll, October 11-13, 2024)

Do you think Israel is justified in responding to the recent Iranian missile attack on its territory which included the launch of over 200 rockets across civilian and military areas, or should it avoid doing so not to trigger a war between the two countries? (Harvard CAPS/Harris Poll, October 11-13, 2024)

Who do you blame more for the escalating conflict in the Middle East: Israel or Iran? (Harvard CAPS/Harris Poll, April 24-25, 2024, May 15-16, 2024, October 11-13, 2024)

If Israel were attacked by Iran, do you think the U.S.… (Heritage Foundation, September 9-13, 2024)

Which country do you consider to be the biggest national security threat to the United States? (McLaughlin & Associates, May 21-23, 2024)

Do you believe Iran would use nuclear weapons against Israel? (McLaughlin & Associates, May 21-23, 2024)

Do you believe that the United States should take measures to prevent an Iranian atomic bomb? (McLaughlin & Associates, May 21-23, 2024)

Do you think that Iran is responsible for the attacks on Israel by Hamas and Hezbollah or do you think Iran is not really behind these attacks? (Harvard CAPS/Harris Poll, April 24-25, 2024, May 15-16, 2024)

Do you think Iran is a danger to the U.S. and the Middle East or is it not really a major danger? (Harvard CAPS/Harris Poll, April 24-25, 2024, May 15-16, 2024)

Do you think that Iran should be allowed to have nuclear weapons or that it must be stopped from having nuclear weapons? (Harvard CAPS/Harris Poll, April 24-25, 2024)

Do you think the best way to stop Iran from obtaining nuclear weapons is to negotiate a deal with it if possible or to place sanctions, isolate it and put a heavy cost to them of pursuing such weapons? (Harvard CAPS/Harris Poll, April 24-25, 2024, May 15-16, 2024)

Do you think it is possible to negotiate a deal with Iran to stop it from obtaining nuclear weapons or would they violate any such deal and develop them anyway? (Harvard CAPS/Harris Poll, April 24-25, 2024 May 15-16, 2024)

Should the US sanction Iran oil to block it from the market or should it continue to let Iran sell its oil? (Harvard CAPS/Harris Poll, April 24-25, 2024, May 15-16, 2024))

Do NATO countries have a responsibility to support Israel against Iranian aggression, or not? (Harvard CAPS/Harris Poll, April 24-25, 2024)

Should the United States push NATO to consider inviting Israel into the alliance to deter from further attacks by Iran? (Harvard CAPS-Harris Poll, April 24-25, 2024)

Has President Biden's Iran policy been successful or unsuccessful? (Harvard CAPS/Harris Poll, December 13-14, 2023, February 21-22, 2024)

Is President Biden acting forcefully and appropriately enough against attacks by Iranian backed terrorists which have claimed the lives of 3 American servicemembers or has his response been too weak? (Harvard CAPS/Harris Poll,s February 21-22, 2024)

Do you think increasing tensions in the Middle East between Iran and the United States will likely lead to war? [wording not exact] (Rasmussen Reports, February 5-7, 2024)

See also: Public Opinion in Iran

Which country do you think poses the biggest threat to the United States: China, Russia, North Korea, or Iran? (Quinnipiac, March 15, 2023, November 9-13, 2023)

Is Iran behind the terrorist attacks in the region? (harrisx for Jewish Federations of North America and Conference of Presidents, November 13, 2023)

Do you think that the Biden administration should have traded releasing 6 hostages from Iran for $6 billion or not made that deal? (Harvard CAPS-Harris Poll, October 18, 2023)

Do you think the administration should honor that deal or suspend any payments to Iran? (Harvard CAPS-Harris Poll, October 18, 2023)

Do you think that the Biden administration has been strong or weak in its dealings with Iran? (Harvard CAPS-Harris Poll, October 18, 2023)

Do you approve or disapprove of the way Joe Biden is handling the war between Israel and Hamas? (ABC News/IPSOS, October 13-14, 2023)

As you may know there is currently a debate about whether US government leaders should be ready to meet and talk with leaders of countries and groups with whom the US has hostile or unfriendly relations. Do you think US leaders should or should not be ready to meet and talk with leaders of Iran? [% Should] (Chicago Council Survey, September 7-18, 2023)

Below is a list of possible threats to the vital interest of the United States in the next 10 years. For each one, please select whether you see this as a critical threat, an important but not critical threat, or not an important threat at all: Iran's nuclear program. (Chicago Council, September 7-18, 2023)

Based on what you know, do you think the U.S. should or should not participate in the following international agreements? The agreement that lifts some international economic sanctions against Iran in exchange for strict limits on its nuclear program for at least the next decade. (Chicago Council,  July 7–26, 2021, September 7-18, 2023)

Do you think the US should continue to pursue negotiations to prevent Iran from obtaining a nuclear weapon in the near future?  (Eurasia Group Foundation, October 5,  2022)

As you may know, President Trump withdrew the United States from the nuclear agreement that the United States made with Iran and five other countries. This agreement lifts economic sanctions against Iran in exchange for Iran dismantling its nuclear weapons program and allowing international inspectors to monitor Iran’s facilities. Some people think that we should re-enter the agreement, and some people think that we should not re-enter this agreement. Do you support or oppose the United States re-entering this agreement? (Jewish Electorate Institute, March 28-April 3, 2022)

Do you think Iran possesses nuclear weapons? (University of Maryland, June 22-July 21, 2021)

There has been some discussion about the circumstances that might justify using U.S. troops in other parts of the world. Please give your opinion about some situations. Would you favor or oppose the use of U.S. troops: To stop Iran from obtaining nuclear weapons? (Chicago Council, January 10-12, 2020,  July 7–26, 2021, July 15-August 1, 2022)

If Iran restarts development towards a nuclear weapon, would you strongly support, somewhat support, somewhat oppose, or strongly oppose the U.S. taking each of the following actions:  Accept that Iran will acquire nuclear weapons. (Chicago Council, January 10-12, 2020,  July 7–26, 2021, July 15-August 1, 2022)

If Iran restarts development towards a nuclear weapon, would you strongly support, somewhat support, somewhat oppose, or strongly oppose the U.S. taking each of the following actions: Conduct cyberattacks against Iran’s computer systems. (Chicago Council, January 10-12, 2020,  July 7–26, 2021, July 15-August 1, 2022)

If Iran restarts development towards a nuclear weapon, would you strongly support, somewhat support, somewhat oppose, or strongly oppose the U.S. taking each of the following actions: Conduct airstrikes against Iran’s nuclear facilities? (Chicago Council, January 10-12, 2020, July 7–26, 2021, July 15-August 1, 2022)

f Iran restarts development towards a nuclear weapon, would you strongly support, somewhat support, somewhat oppose, or strongly oppose the U.S. taking each of the following actions:  Impose tighter sanctions on Iran. (Chicago Council, January 10-12, 2020, July 7–26, 2021, July 15-August 1, 2022)

f Iran restarts development towards a nuclear weapon, would you strongly support, somewhat support, somewhat oppose, or strongly oppose the U.S. taking each of the following actions:  Rejoin the nuclear agreement that lifts some international sanctions against Iran in exchange for strict limits on its nuclear program. (Chicago Council,  July 7–26, 2021, July 15-August 1, 2022)

What do you expect will happen to US-Iran relations during the Biden presidency; will they improve, worsen, or remain the same? (Chicago Council, January 29–February 1, 2021)

If Iran restarts development towards a nuclear weapon, would you strongly support, somewhat support, somewhat oppose, or strongly oppose the U.S. taking each of the following actions: Continue diplomatic efforts to get Iran to stop enriching uranium. (Chicago Council, January 10-12, 2020,  July 7–26, 2021)

How great a priority is it for the United States in Russia to work together on the following issues:  Preventing Iran from developing nuclear weapons capabilities. (Chicago Council, February 2021)

Over the next 10 years, how do you think the relationship between United States and the following countries will change: Iran (Chicago Council, February 2021)

Would you support or oppose the US government launching a military strike on Iran if it announces it now has nuclear weapons? (Harvard-Harris September 22-24, 2019)

As you may know, the United States conducted an airstrike last week that targeted and killed a top Iranian military commander. Do you think that this action will make the United States more safe, less safe, or make no difference? (Chicago Council, January 10-12, 2020)

If Iran attacks U.S. military or diplomatic personnel in the Middle East, would you strongly support, somewhat support, somewhat oppose or strongly oppose the U.S. taking each of the following actions (% strongly/somewhat support (Chicago Council, January 10-12, 2020)

As you may know, President Trump recently authorized an airstrike at Baghdad International Airport that killed Iran’s top general Qasem Soleimani. Based on what you know, do you approve or disapprove of the airstrike? (Morning Consult/Politico, January 10-12, 2020)

Following the airstrike that killed Qasem Soleimani, Iran launched missiles at two military bases in Iraq though no US or Iraqi citizens were killed in these attacks. In response to these attacks President Donald Trump has decided to move forward with economic sanctions, but not further military attacks on Iran. Do you approve or disapprove of each of the following?: President Trump’s decision not to take further military action against Iran (Morning Consult/Politico, January 10-12, 2020)

Do you approve or disapprove of each of the following? President Trump’s decision to impose economic sanctions on Iran (Morning Consult/Politico, January 10-12, 2020)

Based on what you know, how likely do you believe it is that the United States will go to war with Iran in the next month? (Morning Consult/Politico, January 10-12, 2020)

All in all, do you think the U.S. decision to conduct an airstrike that killed Iranian General Soleimani was the right decision or the wrong decision? (Pew Research Center, January 15, 2020)

All in all, do you think the Trump administration’s approach toward Iran has made the United States safer/less safe? (Pew Research Center, January 15, 2020)

All in all, do you think the Trump administration’s approach toward Iran has increased/decreased the likelihood of a major military conflict between the U.S. and Iran? (Pew Research Center, January 15, 2020)

How much do you trust what the Trump administration says about the situation with Iran? (Pew Research Center, January 15, 2020)

Do you think killing Qassem Soleimani, a top Iranian general, was the right action for the United States to take or the wrong action for the United States to take? (Quinnipiac University, January 8-12, 2020)

Do you think the killing of Qassem Soleimani, a top Iranian general, has made Americans more safe, less safe, or has had no impact on the safety of Americans? (Quinnipiac University, January 8-12, 2020)

Do you think President Trump should consult with Congress if he plans to launch more military strikes in the Middle East or not? (Quinnipiac University, January 8-12, 2020)

Do you approve or disapprove of the decision to send more U.S. troops to the Middle East, following the killing of Qassem Soleimani? (Quinnipiac University, January 8-12, 2020)

Would you support or oppose the United States going to war against Iran? (Quinnipiac University, January 8-12, 2020)

Do you approve or disapprove of the way Donald Trump is handling the nation's policy toward Iran? (Quinnipiac University, January 8-12, 2020)

Do you think the U.S. airstrike in Iraq that killed Iranian General Qassem Soleimani has made the United States: (ABC News, January 10-11, 2020)

How concerned are you about the possibility of the United States getting involved in a full-scale war with Iran: (ABC News, January 10-11, 2020)

Do you approve or disapprove of how President Donald Trump is handling Iran? (ABC News, January 10-11, 2020)

Do you approve or disapprove of how President Donald Trump is handling Iran? (NPR/Marist, January 7-12, 2020)

Do you support or oppose the U.S. killing Iranian General Qasem Soleimani? (USA Today/Ipsos, January 7-8, 2020)

Has the killing of Soleimani and its immediate aftermath made the United States more safe or less safe? (USA Today/Ipsos, January 7-8, 2020)

At this moment, would you support or oppose U.S. airstrikes on Iranian military targets in Iran and across the Middle East? (USA Today/Ipsos, January 7-8, 2020)

At this moment, would you support or oppose U.S. airstrikes on targets in Iran including cultural and world heritage sites? (USA Today/Ipsos, January 7-8, 2020)

If Iran were to kill a major U.S. officer in Middle East, would you support or oppose U.S. airstrikes on Iranian military targets in Iran and across the Middle East? (USA Today/Ipsos, January 7-8, 2020)

Do you agree or disagree with the following?: Killing Soleimani shows Iran that the U.S. won’t be pushed around (USA Today/Ipsos, January 7-8, 2020)

Do you agree or disagree with the following?: President Trump’s behavior with Iran is reckless (USA Today/Ipsos, January 7-8, 2020)

How likely, if at all, do you believe it is that United States will go to war with the following countries within the next few years: Iran (Reuters/Ipsos, January 3-6, 2020)

In your opinion, should the U.S. conduct a preemptive attack on Iranian military interests? (Reuters/Ipsos, January 3-6, 2020)

If Iran attacked U.S. military forces first, how should the U.S. respond? (Reuters/Ipsos, January 3-6, 2020)

As you may know, President Trump recently authorized an airstrike at Baghdad International Airport that killed Iran’s top general Qasem Soleimani. Based on what you know, do you approve or disapprove of the airstrike? (Morning Consult/Politico, January 4-5, 2020)

Based on what you know, do you think the airstrike that killed Iran’s top general Qasem Soleimani will make the United States: (Morning Consult/Politico, January 4-5, 2020)

And based on what you know, do you think the airstrike that killed Iran’s top general Qasem Soleimani makes war with Iran: (Morning Consult/Politico, January 4-5, 2020)

Which of the following comes closest to your opinion, even if neither is exactly correct? (Morning Consult/Politico, January 4-5, 2020)

Do you approve or disapprove of the decision to order the airstrike that killed Iranian military commander Qassem Soleimani? (YouGov/HuffPost, January 3-5, 2020)

Do you think President Trump should or should not have gotten authorization from Congress before ordering the airstrike? (YouGov/HuffPost, January 3-5, 2020)

Do you approve or disapprove of the decision to send 3,500 additional U.S. troops to the Middle East following the airstrike? (YouGov/HuffPost, January 3-5, 2020)

Did you approve or disapprove of President Trump’s decision to withdraw the US from the Iran nuclear deal? (YouGov/HuffPost, January 3-5, 2020)

Do you approve or disapprove of Donald Trump’s handling of issues related to Iran? (YouGov/HuffPost, January 3-5, 2020)

Do you think Donald Trump does or does not have a clear strategy for dealing with Iran? (YouGov/HuffPost, January 3-5, 2020)

As you may know, the United States and five other countries entered an agreement with Iran aimed at preventing Iran from developing nuclear weapons. Do you think the U.S. should or should not withdraw from that agreement? (CNN, May 2-5, 2018)

Regardless of what you think about whether the U.S. should withdraw from that agreement, do you think that Iran has or has not violated the terms of the agreement? (CNN, May 2-5, 2018)

As you may know, the United States and other countries made a deal in 2015 to lift economic sanctions against Iran in exchange for Iran agreeing not to manufacture nuclear weapons. This agreement is sometimes referred to as the Iran nuclear deal. Knowing this, do you support or oppose this agreement? (Politico, May 2018)

As you may know, President Trump recently announced that the United States is withdrawing from the Iran nuclear deal. Based on what you know, do you support or oppose the United States withdrawing from the Iran nuclear deal? (Politico, May 2018)

How much have you seen, read, or heard about the United States withdrawing from the Iran Nuclear Deal? (Politico, May 2018)

Which of the following statements comes closest to your view, even if neither is exactly right? (Politico, May 2018)

Does withdrawing from the nuclear deal make Israel more or less safe? (Politico, May 2018)

Does withdrawing from the nuclear deal make the United States more or less safe? (Politico, May 2018)

Does withdrawing from the nuclear deal help or hurt the U.S. national security? (Politico, May 2018)

Does withdrawing from the nuclear deal help or hurt the U.S. economy? (Politico, May 2018)

Does withdrawing from the nuclear deal help or hurt Israel? (Politico, May 2018)

How much have you seen, read, or heard about the United States withdrawing from the Iran Nuclear Deal? (Politico, May 2018)

Do you think the United States should remain in the 2015 Iran nuclear deal, or do you think the United States should leave the 2015 Iran nuclear deal, or don't you know enough about it to say? (CBS, May 3-6, 2018)

Do you think the Iran deal should have been an agreement the President would sign on his own or a treaty that would have required Senate approval? (Harvard-Harris, October 2017)

Do you think the Iran nuclear deal was a good deal or a bad deal for America? (Harvard-Harris, October 2017)

Do you think Iran is following the terms of the nuclear deal or violating the terms of the nuclear accord? (Harvard-Harris, October 2017)

Congress requires the President to certify that Iran is following the nuclear deal on a quarterly basis and can re-impose sanctions on Iran if the President does not certify compliance. The President did not certify compliance. Do you think Congress should impose sanctions on Iran or not? (Harvard-Harris, October 2017)

In decertifying the Iran deal, President Trump does not end the deal but Congress then has 60 days in which it can decide whether to end the deal by putting sanctions back on Iran. Do you think President Trump should have certified that Iran was complying with the deal or was he right to not certify that they were complying? (Harvard-Harris, October 2017)

Do you support or oppose the nuclear deal with Iran? (Quinnipiac, August 2015)

Should we (the U.S.) keep or pull out from the JCPOA agreement? (Harvard-Harris, March 2017)

Do you believe Iran is sticking to, or violating the terms of the JCPOA agreement? (Harvard-Harris, March 2017)

Do you approve or disapprove of the Iran nuclear agreement? (Gallup, February 3-7, 2016)

How closely are you following the news about the nuclear agreement reached between Iran, the U.S., and five other nations last year that recently went into effect - very closely, somewhat closely, not too closely, or not at all? (Gallup, February 3-7, 2016)

Do you see the development of nuclear weapons by Iran within the next 10 years as a critical threat, an important but not critical threat, or not an important threat at all? (Gallup, February 3-7, 2016)

As you may know, the U.S. Congress must approve the agreement the United States and 5 other countries reached with Iran that is aimed at peventing Iran from developing nuclear weapons before it can take effect. Do you think Congress should approve or reject the deal with Iran? (CNN/ORC, September 4-8, 2015)

Suppose such an agreement is approved and Iran violates its terms. If that happens, do you think the United States should or should not take military action against Iran? (CNN/ORC, September 4-8, 2015)

If the agreement is approved, how likely do you think it is that Iran will violate the terms of the agreement: extremely likely, very likely, somewhat likely, or not at all likely? (CNN/ORC, September 4-8, 2015)

(Half sample poll) As you may know, the U.S. and other countries have announced a deal to lift economic sanctions against Iran in exchange for Iran agreeing not to produce nuclear weapons. Do you support or oppose this agreement? (Washington Post, September 7-10, 2015)

*Different wording: Thinking now about the situation with Iran: Would you support or oppose an agreement in which the United States and other countries would lift major economic sanctions against Iran, in exchange for Iran restricting its nuclear program in a way that makes it harder for it to produce nuclear weapons?

(Half sample poll) As you may know, the U.S. and other countries have announced a deal to lift economic sanctions against Iran in exchange for Iran agreeing not to produce nuclear weapons. International inspectors would monitor Iran’s facilities, and if Iran is caught breaking the agreement economic sanctions would be imposed again. Do you support or oppose this agreement? (Washington Post, September 7-10, 2015)

Do you approve or disapprove of the recent nuclear agreement reached between the U.S. and Iran? (Pew, September 2015)

How confident are you in the abilities of the U.S. and the IAEA to monitor Iranian compliance? (Pew, September 2015)

*Do you have confidence in the international monitors ability to monitor Iranian compliance with the deal?

How confident are you that Iran's leaders will hold up their side of the agreement? (Pew, September 2015)

*Do you have confidence that Iran's leaders will hold up their side of the deal?

If this agreement is implemented, do you think the relationship between the U.S. and Iran will improve, get worse or stay about the same? (Pew, September 2015)

How confident are you about the ability of the U.S. and the IAEA (International Atomic Energy Agency) to monitor Iran's compliance? (AJC, September 2015)

Will Israel's security be more or less at risk with the nuclear deal? (AJC, September 2015)

How confident are you that this agreement will prevent Iran from obtaining nuclear weapons? (AJC, September 2015)

Recently, the U.S., along with five other countries, reached a deal on Iran's nuclear program. Do you approve or disapprove of this agreement? (AJC, September 2015)

As you may have heard, one part of the nuclear agreement allows Iranians to inspect their own possible covert nuclear activities at the Parchin site. After collecting samples, photos, and videos, the Iranians will send this information to the U.N. inspectors instead of allowing inspectors to come see the facility. Knowing this, do you approve or disapprove of this agreement? (The Israel Project, September 2015)

Some supporters of the Iran deal have suggested that elected officials who are both Jewish and oppose the nuclear deal with Iran are opposed to the deal because they are more loyal to Israel than the U.S. In your opinion, do these comments constitute anti-Semitism? (The Israel Project, September 2015)

Indicate which of the next two statements you agree with more: (The Israel Project, September 2015)

Based on what you know, do you approve or disapprove of this agreement? (The Israel Project, September 2015)

How much have you seen, heard, or read, about the Congressional debate surrounding the nuclear deal with Iran? (The Israel Project, September 2015)

The United States and other countries have recently negotiated an agreement with Iran to curb that country's nuclear program and prevent Iran from developing a nuclear weapon. Have you seen or heard a lot, a little, or nothing at all about this? (Monmouth University, August 2015)

Should Congress vote to approve or not approve this agreement, or are you not sure? (Monmouth University, August 2015)

How much do you trust Iran to abide by the terms of this agreement - a lot, a little, or not at all? (Monmouth University, August 2015)

Who do you think got more of what they wanted from this deal, the United States or Iran, or did both countries get what they wanted? (Monmouth University, August 2015)

Do you support or oppose the nuclear deal with Iran? (Quinnipiac, August 2015)

Do you think the nuclear deal with Iran will make the world safer or less safe? (Quinnipiac, August 2015)

Do you approve of the way that President Obama has dealt with Iran in general? (Quinnipiac, August 2015)

Recently, Iran and a group of six countries led by the United States reached an agreement to limit Iran's ability to make nuclear weapons for more than a decade in return for lifting economic sanctions against Iran. From what you've heard or read so far, do you approve or disapprove of the recent agreement with Iran, or don't you know enough about it yet to say? (CBS, July 29-August 2, 2015)

Do you think the United States could have negotiated an agreement that was more favorable to the United States, or do you think this was the best agreement the United States could have negotiated with Iran at this time? (CBS, July 29-August 2, 2015)

How effective do you think the recent agreement with Iran will be in preventing Iran from developing a nuclear weapon: very effective, somewhat effective, not very effective, or not at all effective? (CBS, July 29-August 2, 2015)

How much have you seen, read, or heard about the negotiations with Iran in regard to their nuclear program and international sanctions? (The Israel Project, July 2015)

The U.S. Congress has 60 days to review the deal and vote on whether or not to lift U.S. sanctions on Iran. In your opinion, should Congress vote to...? (The Israel Project, July 2015)

As you may know, an agreement was reached in which the United States and other countries would lift major economic sanctions against Iran, in exchange for Iran restricting its nuclear program in a way that makes it harder for it to produce nuclear weapons. Do you support or oppose this agreement, or don’t know enough to say? (Los Angeles Jewish Journal, July 2015)

As you may know, an agreement has been reached between Iran and a group of six other nations, including the U.S. The agreement attempts to prevent Iran from developing a nuclear weapon by limiting Iran's ability to produce nuclear material and allowing inspections into Iran's nuclear sites in exchange for reducing certain economic sanctions that are currently in place. Do you support or oppose this agreement or do you not know enough to have an opinion? (NBC/Wall Street Journal, July 26-30, 2015)

The U.S. and other countries have announced a deal to lift economic sanctions against Iran in exchange for Iran agreeing not to produce nuclear weapons. International inspectors would monitor Iran’s facilities, and if Iran is caught breaking the agreement economic sanctions would be imposed again. Do you support or oppose this agreement? (Washington Post/ABC, July 2015)

Do you support or oppose the agreement (Republicans)? (Washington Post/ABC, July 2015)

Do you support or oppose the agreement (Democrats)? (Washington Post/ABC, July 2015)

How confident are you that this agreement will prevent Iran from developing nuclear weapons? (Washington Post/ABC, July 16-19, 2015)

Do you approve of the way that President Obama has dealt with Iran in general? (Washington Post/ABC, July 2015)

Would you support or oppose legislation that would make any Iran agreement subject to congressional approval? (Quinnipiac, April 2015)

Would you prefer military intervention against Iran's nuclear program or a negotiated settlement to reduce its nuclear potential? (Quinnipiac, April 2015)

How confident are you that this agreement would prevent Iran from developing nuclear weapons; very confident, somewhat confident, not so confident, or not confident at all? (Quinnipiac, April 2015)

As you may know a preliminary agreement was reached in which the United States and other countries would lift major economic sanctions against Iran, in exchange for Iran restricting its nuclear program in a way that makes it harder for it to produce nuclear weapons. Do you support or oppose this agreement? (Quinnipiac, April 2015)

Based on what you know about the proposed new deal with Iran and the negotiations on it's nuclear program, would you say President Obama is being too tough on Iran, too soft, or striking the right balance? (Fox News, April 2015)

Do you think negotiating with Iran is the right thing for the United States to do because it’s the best way to prevent Iran from getting nuclear weapons, or is negotiating with Iran the wrong thing to do because Iran can’t be trusted to honor any agreement? (Fox News, April 2015)

Do you think that Iran poses a real national security threat to the United States? (Fox News, April 2015)

Do you approve or disapprove of the way that President Obama is handling the Iran situation? (Fox News, April 2015)

Last week, the US and 5 other nations struck a tentative deal with Iran. Are you more optimistic or pessimistic that this deal will make the world safer by containing Iran's ability to obtain nuclear weapons? (Bloomberg, April 2015)

As you may know, the United States, along with five other nations, has negotiated the framework of an agreement with Iran to restrict that country's nuclear program. How likely do you think it is that Iran will abide by the agreement and not develop a nuclear weapon? (MSNBC, April 2015)

How closely have you been following news about the United States negotiating an agreement with Iran about their nuclear program? (MSNBC, April 2015)

Do you approve or disapprove of the way that President Obama is handling the situation with Iran? (MSNBC, April 2015)

Have you heard of the nuclear agreement that has been reached between Iran and the P5+1? (Pew, July 2015)

Do you approve of the nuclear agreement that has been reached between Iran and the P5+1 (Republicans)? (Pew, July 2015)

Do you approve of the nuclear agreement that has been reached between Iran and the P5+1 (Democrats)? (Pew, July 2015)

What do you think the effect of the deal will be on Iranian-U.S. relations? (Pew, July 2015)

If you have heard at least a little bit about the negotiations, do you think that the Iranians are serious about addressing nuclear concerns? (Pew, March 30, 2015)

Do you approve or disapprove of the United States negotiating directly with Iran over it's nuclear program? (Pew, March 30, 2015)

The United States, United Kingdom, France, Germany, Russia, and China are negotiating a long-term nuclear deal with Iran. News reports suggest that any final agreement will allow Iran to retain the ability to enrich nuclear fuel for civilian applications. Would such an agreement be helpful or harmful to U.S. national security? (William & Mary, TRIP Poll, March 2015)

Currently there is some debate about what stance the US should take in relation to the possibility that Israel might attack Iran's nuclear program. You will see three arguments on this issue. Please select how convincing you find each of them. (University of Maryland, March 3-7, 2012; October 2, 2012)

1. The US should discourage Israel from attacking Iran's nuclear program. There are huge risks to US national interests, since Iran may attack US assets in retaliation, pulling the US into a war. Oil prices will skyrocket. Furthermore, US military leaders say the most that could be achieved would be to slow down Iran's nuclear program a bit and probably just lead them to rebuild it underground.

2. The US should take a neutral stance. Israel has a right to take actions it sees as necessary for its own defense. Meanwhile, the US should think about its own interests and make a clear statement distancing itself from whatever Israel may choose to do, to reduce the chance that Iran will retaliate against US targets.

3. The US should encourage Israel to attack Iran's nuclear program. Clearly Iran is trying to develop nuclear weapons, and if Israel will take the heat for stopping or at least slowing down the program, all the better for the US. The risk of Iran acquiring nuclear weapons is of greater concern than the fallout from an Israeli strike.

Do you think the United States should or should not proceed with a military strike on its own if Iran continues to enrich uranium, but the UN Security Council does not authorize a military strike? (Chicago Council on Global Affairs, October 1, 2012)

Do you approve or disapprove of the way President Obama is handling Iran's Nuclear Program? (AJC, September 17, 2012)

How concerned are you about the prospect of Iran obtaining nuclear weapons? (AJC, April 30, 2012; September 17, 2012)

How likely do you think it is that a combination of diplomacy and sanctions can stop Iran from developing nuclear weapons? (AJC, April 30, 2012; September 17, 2012)

If diplomacy and sanctions fail, would you support or oppose the United States taking military action against Iran to prevent it from developing nuclear weapons? (AJC, April 30, 2012; September 17, 2012)

If diplomacy and sanctions fail, would you support or oppose Israel taking military action against Iran to prevent it from developing nuclear weapons? (AJC, April 30, 2012; September 17, 2012)

Do you believe that Iran is developing nuclear weapons? (ADL, October 23, 2011; The Israel Project, July 31, 2012)

Would you support U.S. military action against Iran if there were evidence of a nuclear weapons program? (Reuters/Ipsos, March 11, 2012)

Would you support U.S. military action against Iran if it led to higher gasoline prices? (Reuters/Ipsos, March 11, 2012)

Would you support Israeli military action against Iran if there were evidence of a nuclear weapons program? (Reuters/Ipsos, March 11, 2012)

Would you support U.S. military action against Iran? (Reuters/Ipsos, March 11, 2012)

As you may know, some people are calling for Israel to conduct a military strike against Iran's nuclear program before it makes further progress. Others are arguing that it is better to wait for the newly-increased sanctions against Iran to take effect and that the US and other major powers should continue pursuing negotiations with Iran. Do you favor: (University of Maryland, March 3-7, 2012)

Do you think that Iran is: (University of Maryland, March 3-7, 2012)

How likely do you think it is that Iran will eventually develop nuclear weapons? (University of Maryland, March 3-7, 2012)

Suppose Iran develops nuclear weapons. Do you think that: (University of Maryland, March 3-7, 2012)

If Iran develops nuclear weapons, which of the following concerns you the most: (University of Maryland, March 3-7, 2012)

If Iran were to develop nuclear weapons, which TWO of the following do you think is most likely to occur: (University of Maryland, March 3-7, 2012)

In dealing with the problem of Iran's nuclear program, do you think that the US should: (University of Maryland, March 3-7, 2012)

Suppose Israel strikes and Iran retaliates by striking back at Israel, but Iran does not attack any US targets. What do you think the US should do? (University of Maryland, March 3-7, 2012)

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As you may know, the US government has recommended that Israel not strike Iran. If Israel strikes anyway, what do you believe the US government's reaction WOULD be? (University of Maryland, March 12, 2012)

If Israel were to strike Iran's nuclear facilities, in your estimation, how long would an armed conflict between Iran and Israel last? (University of Maryland, March 12, 2012)

If Israel were to strike Iran's nuclear facilities, in your view, how would this affect the Iranian government? (University of Maryland, March 12, 2012)

What do you believe the likely outcome would be if Israel were to strike Iran: (University of Maryland, March 12, 2012)

Is it more important to... (Pew, February 15, 2012)

If Israel attacks Iran to stop its nuclear weapons program, what should the U.S. do? (Pew, February 15, 2012)

How likely is it that Iran will develop a nuclear weapon in the near future? (Rassmusen Reports, February 4-5, 2012)

If Israel attacks Iran, should the United States help Israel, help Iran, or do nothing? (Rassmusen Reports, February 4-5, 2012)

Should the US be willing to use military force to prevent Iran from getting nuclear weapons? (Pulse Opinion Research, February 2, 2012)

How concerned are you about a terrorist attack on the US by Iran? (Pulse Opinion Research, February 2, 2012)

Among likely U.S. voters: Do you believe the U.S. should use military force to prevent Iran from developing nuclear weapons if diplomatic efforts fail? (Rassmusen Reports, November 14, 2011)

Which of the following describes your view of Iran: Iran is an immediate threat to the security of the Middle East, a threat to the security of the Middle East in the future, a potential threat further down the road, or no threat at all? (ADL, October 23, 2011)

Do you think that Israel should take military action to keep Iran from developing or trying to develop a nuclear weapons program ? (ADL, October 23, 2011)

Do you think that the United States should take military action to keep Iran from developing or trying to develop a nuclear weapons program ? (ADL, October 23, 2011)

If Iran attains nuclear weapons do you believe Iran would use them to attack Israel? (Independent Media Review Analysis, September 2011)

If Iran attains nuclear weapons do you believe Iran would use them to attack United States military bases and ships in the Persian Gulf and Middle East? (Independent Media Review Analysis, September 2011)

If Iran attains nuclear weapons do you believe Iran would arm terrorists who would use the nuclear weapons to attack the United States? (Independent Media Review Analysis, September 2011)

If sanctions against Iran do not work, would you approve or disapprove of using the military to attack and destroy the facilities in Iran which are necessary to produce a nuclear weapon? (Independent Media Review Analysis, September 2011)

Which country is the greatest threat to the United States? (Independent Media Review Analysis, September 2011)

Which country is the second greatest threat to the United States? (Independent Media Review Analysis, September 2011)

Please rate using a one to one hundred scale, where one means you have a cold/very unfavorable feeling, one hundred means you have a warm/very favorable feeling and fifty is neutral, your feelings toward Iran. (The Israel Project)

Iran is currently developing a nuclear weapon. When Iran is able to produce a nuclear weapon, how likely do you think it is that Iran would do each of the following? (McLaughlin & Associates, October 2010)

"Launch a nuclear missile attack on the United States."

"Launch a nuclear missile attack on Israel."

"Provide nuclear weapons to terrorists."

Would you approve or disapprove of the following proposals? (McLaughlin & Associates, October 2010)

"Using the military to attack and destroy the facilities in Iran which are necessary to produce a nuclear weapon, if sanctions do not work."

"Allowing Israel to attack and destroy Iran's nuclear weapons program facilities, if sanctions do not work."

If sanctions against Iran fail, and Israel were to attack Iran to stop them from developing a nuclear weapons, in your opinion, would this be an act of self defense, or an act of aggression? (McLaughlin & Associates, October 2010)

If Israel were to attack Iran to stop them from developing a nuclear weapon, in your opinion, would this endanger the United States, or enhance the security of the world? (McLaughlin & Associates, October 2010)

Many experts say that Iran is currently developing nuclear weapons. Can the United States be safe with a nuclear Iran? (McLaughlin & Associates, October 2010)

President Obama is pursuing a policy of diplomacy and sanctions to stop the Iran nuclear program. Do you think this policy will succeed? (McLaughlin & Associates, October 2010)

Do you think President Obama's policies toward Iran will stop them from getting nuclear weapons? (McLaughlin & Associates, October 2010)

Do you think President Obama's failure to stop Iran's nuclear program would lead to a nuclear arms race in the Middle East? (McLaughlin & Associates, October 2010)