I came to these negotiations with an open mind. Prioritizing engagement over coercion in an attempt to end three decades of animosity with Iran appeals to the American idealism in us all. And while we should strongly support diplomacy, the other side must believe there are real consequences in its failure. In this case, Iran never felt that, resulting in a very disappointing outcome for our country.

Throughout history, Congress has rejected or altered hundreds of international agreements, many of them multilateral. For the administration to say there is no other deal than this one is an effort to negate Congress’s important role and responsibility.

The administration has repeatedly stated that this agreement is about ensuring Iran does not get a nuclear weapon. Therefore, the agreement should be one that allows us to maintain leverage and ensure it is enforceable, is verifiable and holds Iran accountable.

This deal does not do that and instead leaves the United States vulnerable to a resurgent Iran wealthier and more able to work its will in the Middle East.