What's gonna happen in Iowa?

[tarheel-leftist85]

We (okay, probably just me) often discuss things in broad terms?  Who'll get the nominations for each party?  Who'll win?, etc., etc.  Sometimes we really need to delve into the nitty gritty.
With this in mind, let's postulate on the Iowa Caucuses--for both parties.  Who will compete?  Who will sit out?  Who will skip Iowa but go on to SC or NH?  What will the final tally be?  What will be the aftermath after the caucuses have caucused?
Discuss!  After we've beat this horse dead, we'll move on to NH, SC, etc.
P.S.:  If y'all want to end each post with who you think will win the Rep. nomination for Reps. (or those who usually vote w/ Reps.) and Dem. nomination for Dems. (or those who usually vote w/ them), we could keep a tally.  This might be more interesting than just conducting a poll as to who will win the nomination.