Even on weekends. Obama won everything there was to win on Saturday - Louisiana, Nebraska, and Washington. Oh, and the US Virgin Islands. Have to let the Virgins have their say. The Nebraska and Washington results were thumpings, with Obama picking up better than 2-1. Not enough to, you know, win this thing, but all told its better to be winning than not.
This brings us to John McCain not winning. He lost Louisiana and Kansas and barely eked out a win in Washington. Which is a lot a losing for a front-runner to do. I'll outsource to Kevin Drum on why this means McCain is in trouble.
Update: Maine catchesObamania goes for him 59-40. Obama is 5-0 for the weekend. Rolling.