Fifty years ago, the civil-rights movement understood that nonviolence can be an effective weapon even if—or especially if—the other side refuses to follow suit. Obama has a similarly tough-minded understanding of the political uses of bipartisanship, which, even if it fails as a tactic for compromise, can succeed as a tonal strategy: once the other side makes itself appear intransigently, destructively partisan, the game is half won. Obama is learning to throw the ball harder. But it’s not Rovian hardball he’s playing. More like Gandhian hardball.