John Kerry actually said...

A vote of disapproval in the absence of a credible alternative, would, after 10 years of effort, be self-defeating for our country.

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.

The burden should rest on Iran to prove its compliance, not on the U.N. to prove its failure to comply.