Obama responded with the classic phrases of a politician in trouble. “That was the information that I had at the time. . . . Those charges are completely unrelated to me. . . . I have said that that was a mistake. . . . The fact pattern remains unchanged.”

When those failed, Obama tried another approach. “We’re running late,” the candidate said, and then he disappeared behind a curtain.

Of course, they waited until the night before the Texas and Ohio primaries.

UPDATE: Is Obama lying about NAFTAGate? “He certainly doesn’t seem to be telling the whole truth. . . . Obama appears to be in a difficult position. At first, his campaign denied that there was any contact with the Canadian government. Then, when it was forced to concede that there had been contact, it insisted that it had nothing to do with softening Obama’s position on NAFTA. And then, when the newly-released memo suggested that it had been about just that, Team Obama simply stuck with its story.”