Obama's speech yesterday in support of the Iran deal had one obvious structure: taking on objections to the deal point-by-point, in substantive detail. It had a parallel thematic structure: opposing the tradition of American multilateral diplomacy to the drum-beating of hegemonists, proponents of preemptive war.
Casting himself in the former tradition, which he portrayed as the longstanding consensus position of U.S. foreign policy, he repeatedly invoked first Kennedy and then Reagan, intertwining the words and deeds of both. On the hegemonist side, he invoked one counterfactual and one actual disaster: first-strike proponents against the Soviets, and Iraq war proponents, whom he linked to opponents of the Iran deal.