Give it another 1-2 weeks and buy Clinton.
Yeah, if you're still rooting for Clinton in a week, and have the money to spare, you should send it to her.
What possibly makes you think I'm "rooting" for Clinton. I think, at this point, she's going to win the nomination.
Those later primaries favor her and she's staying in. The time where Obama could have knocked her out has passed.
Another major problem for Obama are the Superdelegates, which by and large support the establishment candidate Clinton.
Oh, and if Democrats think they can get away with having a down-to-the-wire race without including Florida and Michigan's opinions in any way, they're nuts. They probably wouldn't have won Florida anyway, but they shouldn't be trying to give McCain any more of an edge in Michigan than he might already have, lest they risk losing the state.
There are still a lot of superdelegates out there that haven't endoresed either side. If Obama is leading by elected delegates by the end, then some 200-300 superdelgates will throw their support behind him. No way that the supers overrule the elected delegates. Not unless the Democratic party wants a open revolt on their hands.