Obama's "Rolling Thunder Tour" through the Middle East and Europe has likely decisively changed the arc of both the war and McCain's presidential candidacy.
Usually it's only in retrospect that history judges a moment to be a turning point politically, like the day in 1980 that Jimmy Carter's helicopters on a hostage rescue mission crashed in the Iranian desert - and so did his chance for reelection.
But Senator Obama's trip this past week was like a rolling decisive moment, stylistically, substantively and politically. I'd be surprised if years from now we don't look back on these 10 days as when his 4-6 point lead hardened and expanded.
Our conversation with Senate Armed Services Chairman Carl Levin - and Arianna Huffington and David Bender - converged on the conclusion that Obama looked "presidential" and like a commander-in-chief while McCain looked like a biblical Job wandering around from golf carts to supermarket aisles shopping for news and votes. Short of negotiating peace between Shia and Sunni, it's hard to conclude anything other than Barack Obama won the week, if not the election.
First, the contrast between the two candidates couldn't have been more pronounced. One was calm, cool, poised, positive - the other was surly and defensive.
Second, one was vindicated on his Iraq position when Prime Ministers Maliki and Brown agreed with a 16 month timetable for withdrawal - while Bush agreed on a time "horizon" and even McCain told Wolf Blitzer that "16 months was a pretty good timetable."
Listen: 7 Days in America with Sen. Carl Levin, David Bender, Arianna Huffington and Mark Green