I understand your suspicions, but I think you're basing your fears on the fact that the Kerry Campaign seems to be unwinding through mistake after mistake. I think the Dems who are still Dems are just plain too stupid to put together a credible campaign.
Question is, can they get much more dumb? Probably. My advice is to just sit back and enjoy the show.
Why would Kerry withdraw? He's been aiming for this his whole life, and no one will convince him he should withdraw.
I am 100% sure he will remain the nominee.
The Kerry team is over their head, and they are dealing with someone who has been spoiled into thinking that Massachusetts is mainstream America.
Mary Beth Cahill is particularly unimpressive -- makes Susan Estrich look like a pro.