After over six hours of debate, the U.S. Senate blocked a cloture motion (S.625) on a disapproval resolution  concerning the Joint Comprehensive Plan of Action (JCPOA). The final count was 58 votes to advance the resolution and 42 against. As a result, opponents of the nuclear agreement failed to advance a resolution that would disapprove of the nuclear agreement.

The debate and vote on the cloture motion was largely partisan. All but four Democrats voted against and every Republican voted for cloture.