Karl Rove, on Face the Nation this morning, says "Obama is thin on experience... lost the Democratic primary for Congress eight years ago, first-term Senator." Effectively, Senator Clinton would be the more formidable Democratic candidate, and (apparently) Clinton would be the Democratic nominee.
President George Bush also apparently said, "I certainly don't know what [Senator Obama] believes in."
So - it could be that Bush/Rove are offering objective analysis. On the other hand, could it be that they want Senator Clinton as the Democratic nominee, knowing even if Senator McCain can't rally the conservative base behind him, Senator Clinton could do that for McCain? Or, they want Democrats to think Republicans want Clinton as the nominee, so Obama wins, and then the Republicans can tear Obama apart?
This is so much fun!