New documents shed new light on his ties to a leftist party in the 1990s. On the evening of January 11, 1996, while Mitt Romney was in the final years of his run as the head of Bain Capital, Barack Obama formally joined the New Party, which was deeply hostile to the mainstream of the Democratic party and even to American capitalism. In 2008, candidate Obama deceived the American public about his potentially damaging tie to this third party. The issue remains as fresh as today’s headlines, as Romney argues that Obama is trying to move the United States toward...