To give a good, political non-answer, I'll say who I think is out.
Lieberman might stick it out, but I think he only appeals to a small sliver of Democrats. He spends more time attacking his fellow candidates than he does making proposals or even attacking Bush. Sometimes, he just complains about the party in general. Thus far, he's been sustained on name recognition, but I think he has no where to go but down.
Sharpton may get a boost if he does well in the DC quasi-primary, but he's thankfully not in it to win (IMO), just to remind Dems that if we lose w/o the African American vote, we lose the election. He'll have a great deal of negotiating power if the he can mobilize black voters for a candidate who needs it, like possibly Dean.
I'm not certain that the theory that
Mosely-Braun jumped in to pull voters away from Sharpton is entirely false. Either way, I think she's partially in it because it's nice to have a black woman vying for the pres. nomination of a major party. Maybe she'll stick it out for that- her language occasionally suggests she might really want to- but she also strikes me as somewhat a friendly insider. I'm hoping she jumps out before doing too poorly, and campaigns for another.
Kucinich. There's a thread on it. When the song says "fools to the left of me, jokers to the right . . ." he meant Kucinich and Lieberman. He'll incite Naderites to go down in flames with him in an orgy of vanity. If Nader runs for the Greens, I wouldn't be surprised if Dennis was out there actively aiding a 2000 repeat.
Wow, surprise surprise, that leaves alot of well-off white guys with simple names. Why can't Powell be a liberal Dem?
Edwards might pull it off as a "surprise" high-performer in the "3rd wave" (post Iowa/NH) primaries, and that could engender alot of coverage.
If he plays all of that well, then he might take off. But that's alot of ifs.
Gebhardt has decent showings in Iowa and solid unions support, but comes with a lot of baggage in the eyes of important party factions. He might be the next biggest turn-off to Dean voters after Lieberman. I look for him to be a sort of consistent 2nd-to-4th in the primaries, but I don't think he'll do well enough to garner notice or support outside his base.
Kerry's problem, to me, is 1.) he's boring, 2.) he's too attackish. He's more liberal than Dean in someways, but he took the bait when Dean was bashing the other Dems as sell-outs and lost the argument out of charisma. If he could find energy, be more consistently charming, and draw a better contrast with Dean, he could become the frontrunner again. But I think it might be too late for him to capture much of an audience in a crowded field- maybe as the candidates get fewer, freeing up committed votes?
I don't know how literally you meant it, but I don't think the media has predetermined a
Dean/Clark showdown. Clinton came from nowhere by not getting trounced as badly as he should have. That leaves room for anything that upsets that exact expectation- the combined probabilities surrounding the other top candidates- to capture media attention. I think Dean's rhetoric is far to the left of his record and he's canny enough a politico to moderate when the time comes, I also think Clark's main problems are organizing his campaign team/ grass roots and getting more face time to let Dems get used to the newcomer. The media might try to lead the horse to water, but it doesn't always drink; they report what's surprising. If Dean or Clark stall and another gets lucky, we'll soon forget it was ever "just" the two of them.