Obama is often caught on the back foot — more often than not being informed of the big political stories by the media and not by his staff. Still, given how quickly the rest of the world cottoned on to what had happened in Ukraine, it is difficult to believe that, when he stepped onto the stage in Delaware yesterday, he was incapable of changing his plans. He did not. Instead, the president spent a grand total of 38 seconds on the downing of the plane, describing what he knew to have been an atrocity as a “tragedy” that “might”...