It is so expensive to run now that I think more candidates won't make it the whole way to actual voting. Vilsack's dropping out only affects Iowa where the last poll I saw had him at 14%. Those votes have to go somewhere, and bear in mind Vilsack's a Clintonista, big past Clinton supporter/DLC guy, who the news stories said called Hillary and apologized to her when he decided to run against her. I wouldn't be surprised at all if Team Hillary pressured him out and that he'll end up endorsing and being one of her national chairmen or something.

Biden's a foreign policy expert and has put forth the most practical ideas on the Iraq war situation. But I think both he and Chris Dodd are running purely to get their positions out there and push their policies and that both will drop out well before the end of the year. The only candidate who might be standing besides Hillary, Obama and Edwards by Iowa might be Kucinich, who's an egomaniac perennial now, like Pat Paulsen used to be.

There is and will be increasingly enormous pressure from the party for those who aren't scoring in the polls to drop out. Before long, you'll see Hillary, Obama and Edwards refusing to debate the likes of Dodd, Biden, Kucinich if they don't have five percent in the polls. Thats just the business of politics now.