He ain't triangulating, he's my post-partisan. That's Eugene Robinson innovative new MSM means of covering for Barack Obama. As Obama sprints toward the center and away from many of the positions that won him the nomination from the liberal Dem base, WaPo columnist Robinson has suggested that the nominee isn't engaging in the kind of cynical "triangulating" that made Bill Clinton famous. No, Obama's just being the real post-partisan he really was all along. EUGENE ROBINSON: "My headline tonight is a question: is it post-partisanship, or plain old triangulation? I think everyone's instinct, when we heard Barack Obama talk about...