John Kerry actually said...

The overall effectiveness of the agreement will thus require the Obama administration and its successors to maintain a very tough inspection...

On balance, however, I believe the nuclear deal will deliver more advantages than disadvantages to the United States.

I also fear a vote of disapproval would weaken the effectiveness and credibility of the United States in the Middle East and around the worl...

If Congress votes to disapprove and manages to override the President's veto, it would very likely dismantle the agreement.