In recent days, President Obama has hammered Mitt Romney on the campaign trail for being a flip-flopper. There’s plenty of material there, and it’s a wonder that Obama didn’t exploit it earlier.

But Obama overreached on Wednesday. “You could take a videotape of things I said 10 years ago, 12 years ago … and you’d say, ‘Man, this is the same guy,’ ” Obama boasted at a campaign stop in Iowa.