Well, as an Iowan, let me tell you something; there are a LOT of Iowa Democrats NOT voting today because of how those caucases went down in 2008.
There were Chicago thugs at a considerable number of them along Iowa's 'east coast' and even further inland to Cedar Rapids and Des Moines.
Those caucus outcomes did not entirely reflect the wishes of Iowas tried and true Democrats. They didn't bail on him at the time; there was precious little time between the caucuses and the election and a lot of energy putting into defeating the heir to G.W.
Now, after seeing what Obama hath wrought on America these last 4 years, and having had ample time to reflect on how he won the Iowa caucus in the first place; he will lose Iowa today.