The GOP-led Senate and House are expected to turn down the deal next month.
Obama has pledged to veto such a resolution of disapproval. The question then becomes whether the deal’s foes can muster the votes to override the president.
In a speech Monday in his home state, McConnell talked about the difficulty of overriding a veto. As a result, McConnell said, Obama likely will prevail.
McConnell later told reporters he’s confident only Democrats will back the president.
McConnell called it a "flawed deal." He said the inspections are flawed and it leaves the Iranians with "threshold nuclear capability."