Why will college students not be in Iowa during caucuses? Since if they are attending private schools (not state schools), many are from out of state--and will be home during the Christmas holidays. They will not be able to vote, unless they have arranged absentee voting, nor will they be able to ferry Obama supporters to the polls or do other work for him then.

So unless Hillary's campaign is going down in flames for other reasons, she will do well in Iowa--probably better than polls now indicate--since older women and union members, her strongest supporters, will still be in Iowa.

But if she does not for some reason win by a large margin, Obama and Edwards can team up afterwards and stop her.