Obama has successfully given Iran the ability to continue funding terrorism, thereby increasing terrorist activity throughout the world.

Senator David Perdue (R-GA)

"Let's be clear, this agreement is not final. Georgians and the American people, through Congressional representation, must sign off on the negotiated terms, and because of our bipartisan efforts Congress will have 60 days to do so. As a member of the Foreign Relations Committee, I will review this agreement with the utmost scrutiny to ensure we remain steadfast in our efforts to halt the expansion of nuclear arms now and down the road.

"Right now, I remain extremely concerned that this deal does not go far enough to fully prevent Iran from developing a nuclear weapons capability and ensure anytime, anywhere inspections access of all nuclear and military sites. If this requires walking away from such a deal and strengthening sanctions, I will encourage President Obama to consider this course of action. To be clear, rejecting this agreement is not condoning war, it is standing firm for peace and against Iranian aggression."

Senator Rob Portman- (R - OH)

“I look forward to reviewing details of the nuclear agreement reached earlier today in Vienna. As I have said since the start of this process, I will weigh this agreement on the merits. I will be reviewing whether it is enforceable—both through effective international monitoring and the ability to re-impose sanctions if violations occur while assuring that sanctions relief is not given unless and until Iran meets its commitments—and whether the agreement prevents Iran from developing a nuclear weapon capability. This is of the utmost importance for our own national security, as well as for our close allies in the region such as Israel. Congress has a responsibility to carefully review the agreement to ensure it is in the best interests of our national security.”

Senator Jack Reed - (D - RI)

“It has taken nearly two years of persistent, rigorous negotiations to reach this point. President Obama and his negotiating team - at every echelon, including our scientists and nuclear experts - deserve the nation’s thanks."

Senator Harry Reid- (D - NV)

“Today’s historic accord is the result of years of hard work by President Barack Obama and his administration. The world community agrees that a nuclear-armed Iran is unacceptable and a threat to our national security, the safety of Israel and the stability of the Middle East. Now it is incumbent on Congress to review this agreement with the thoughtful, level-headed process an agreement of this magnitude deserves.”

Senator James E. Risch - (R - ID)

"This deal falls disastrously short of what the Obama Administration originally promised and gives the Iranian government what it desires. The West will have to live with a nuclear Iran and will abandon our closest ally, Israel, under this horribly flawed agreement."

Senator Pat Roberts- (R - KS)

“After months of delays in which Administration negotiated to Iran’s demands, President Obama calls this deal a success. The only way I can see a success is if the agreement denies Iran a nuclear weapons capability and does not provide the rogue nation with billions of dollars in sanctions relief. It’s imperative that Congress cautiously reviews this deal and ensures that it holds the Iranians accountable so that the world doesn’t become an even more dangerous place for the U.S. and our allies. That’s the standard by which I will judge the agreement when all of the details are submitted to Congress.”

Senator Mike Rounds (R-SD)

“I’ve said all along that anything short of stopping the Iranians from ever obtaining a nuclear weapon is unacceptable. Based on what we know so far, it appears this deal not only fails to meet this essential goal, it emboldens the Iranians, who will receive $150 billion in sanctions relief, a phased out lifting of a UN arms embargo and be allowed to test more advanced centrifuges over 10 years. Today’s testimony from General Selva confirms that under this deal, Iran will have the ability to continue funding terrorism, thereby increasing terrorist activity throughout the world.”

Senator Marco Rubio - (R - FL)

“I have said from the beginning of this process that I would not support a deal with Iran that allows the mullahs to retain the ability to develop nuclear weapons, threaten Israel, and continue their regional expansionism and support for terrorism. Based on what we know thus far, I believe that this deal undermines our national security. President Obama has consistently negotiated from a position of weakness, giving concession after concession to a regime that has American blood on its hands, holds Americans hostage, and has consistently violated every agreement it ever signed. I expect that a significant majority in Congress will share my skepticism of this agreement and vote it down. Failure by the President to obtain congressional support will tell the Iranians and the world that this is Barack Obama's deal, not an agreement with lasting support from the United States. It will then be left to the next President to return us to a position of American strength and re-impose sanctions on this despicable regime until it is truly willing to abandon its nuclear ambitions and is no longer a threat to international security.”

Senator Bernard Sanders - (I - VT)

“I congratulate President Obama, Secretary Kerry and the leaders of other major nations for producing a comprehensive agreement to prevent Iran from obtaining a nuclear weapon. This is a victory for diplomacy over saber-rattling and could keep the United States from being drawn into another never-ending war in the Middle East. I look forward to learning more about the complex details of this agreement to make sure that it is effective and strong.”

Senator Ben Sasse (R-NE)

“Sadly, the Administration just lit the fuse for a nuclear arms race in the Middle East. We all know Iran’s neighbors will not sit idly as the world's largest state-sponsor of terror becomes a nuclear-threshold state.

Senator, Brian Schatz - (D - HI)

“The accord announced in Vienna today marks a watershed moment in our pursuit to stop the spread of nuclear weapons. I will review the final deal to ensure that it effectively prevents Iran from acquiring the material it would need to develop a nuclear bomb, has sufficient limits on Iran’s nuclear weapons-related infrastructure, and that the inspection and transparency regime for holding Iran accountable is robust and will protect the interests of the United States and its allies, especially Israel. If this is a good deal, it is the first step in a long road to blocking Iran’s access to a nuclear weapon, and we must remain vigilant to ensure Iranian compliance. Our guiding principle must continue to be distrust but verify.”

Senator Jeanne Shaheen - (D - NH)

“Throughout negotiations, I’ve been adamant that the United States must prevent Iran from obtaining a nuclear weapon and that hardnosed diplomacy is the preferred means of doing so. Earlier this year, Congress passed legislation, which I supported, that allows the House and Senate to consider this weighty agreement in all its detail. It is critical that Congress take the time necessary to conduct this review. My support for this deal hinges on whether we can verify that Iran’s paths to obtaining a nuclear weapon are thoroughly blocked. I want to congratulate Secretary Kerry, Secretary Moniz and the rest of the negotiating team for their tremendous persistence in reaching this agreement, and I look forward to a thorough review with my colleagues on the Foreign Relations Committee.”

Senator John Thune - (R - SD)

“Now that a deal has been struck, the onus is on President Obama to convince the American people that the contents of this deal are beneficial to the safety and security of our nation. I look forward to further reviewing details of the agreement, but I am deeply skeptical that it will stop Iran from acquiring a nuclear weapon, and I am gravely concerned that the world’s leading state sponsor of terrorism will soon have access to billions of dollars and other resources to finance its campaign for increased regional influence.

Senator Patrick J.Toomey - (R - PA)

"I look forward to closely examining this nuclear agreement during the upcoming 60 day Congressional review period. Preliminarily, I have deep concerns that this deal will provide hundreds of billions of dollars to an untrustworthy Iranian regime's support for terrorism, while ushering in a nuclear arms race throughout the Middle East."

Senator Tom Udall - (D - NM)

"The next critical step is for Congress to review the agreement, and I will be carefully considering the details, as well as the alternatives. It is vital for Congress to hear from our experts, including those at New Mexico's national labs, in order to understand how this deal will prevent Iran from acquiring a nuclear weapon. I urge Congress to study the agreement thoughtfully - not with an eye to U.S. politics but on what will prevent Iran from acquiring a nuclear weapon or the materials to develop one. We all agree that a nuclear-armed Iran is a serious threat that must be prevented. This is the greatest nuclear nonproliferation challenge of our time, and it is a challenge that we must meet."

Senator David Vitter- (R - LA)

“First, under its own terms, the deal accepts Iran eventually getting nuclear weapons. Second, there are huge holes in verification which, to me, make it certain that Iran will successfully cheat.”

Senator Mark R.Warner - (D - VA)

“I will review this agreement with the utmost attention to detail, given the incredible importance of getting an agreement of this magnitude right. Under the Iran Nuclear Agreement Review Act, which I supported, Congress will have 60 days to analyze this agreement and carefully consider whether it substantially advances the goal of preventing Iran from acquiring a nuclear weapon. In particular, I will pay close attention to the dismantling of Iran’s illegal nuclear weapons program; ensuring an intrusive and reliable verification process; and ensuring a graduated process of sanctions relief entirely dependent upon Iran’s compliance, along with a process for re-imposing U.S. and international sanctions if Iran violates terms of the agreement.”