The weekend will be dominated by back-and-forth on the Iran deal. The administration will argue that some agreement was necessary and this was the best that could be got. They will continue their almost childlike insistence that it proves President Obama is either Ronald Reagan (he negotiates with foes) or Richard Nixon (he reaches out to adversaries).

There will be plenty of serious criticism of the deal, accompanied by a generalized sense that the U.S. probably got taken—because Mr. Obama always wants it too much. As with...