Sen. Barack Obama not only thinks he has better policies than Sen. John McCain — he says he has better moves, too.

“I’m convinced I’m a better dancer than John McCain,” he confided to Ellen DeGeneres last week.  Obama’s dancing on her talk show has become an enduring hit on YouTube, as I noted, and another video making the rounds online features a mash-up of the presidential debates with “So You Think You Can Dance.”

Now there’s a video to top them all — and it turns out Obama has seriously underestimated McCain’s breakdancing prowess. Behold, the dance-off: