Not sure that I have any faith in Iowa caucus voters....over-rated.
As are the other early voting states - NH, SC, and Fla. The media and the party hacks declare it over after those and throw their weight behind the leaders/winners. Yet, there is still a long way to go and many a slip left to make. I hope all of the candidates hang in there.
Caucus states like Iowa depend more on organization than on popularity. You need people on the ground working all the precincts to make sure your people show up to vote in the caucuses. They are held in various places and at fixed times. It is not like an election where you have all day to vote. That is why Santorum has spent so much time there. That is why the party organization is important.
This year many of us are tired of the party organization and consider them part of the problem.