With 10 days until the election, Barack Obama's latest strategy is to claim that his opponent has developed "stage 3 Romnesia." Mitt Romney, the argument goes, is conveniently forgetting his real agenda, flipping his positions to better appeal to the electorate. Since Mr. Romney's conservative base would surely disagree, this raises the question of whether the president isn't himself suffering from a psychological malady that experts call "projection."

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"I happen to be a proponent of a single-payer universal health care...