I thought this was interesting in a sad sort of way:

In summary, the turnout for the Republican Iowa Caucus was nearly 50% higher than the previous Caucus with a 125,000 record turn out. It was expected that the turnout would be about 75,000-80,000 with the unknown being the evangelical and fair tax groups. Had such been the case, Mitt would have won Iowa with his stable and strong support. It wasn't to be. Of the 35% that voted for Mike Huckabee, 80% claimed the label of evangelical Christians.

Upon further inquiry, a large majority of the evangelicals stated that the most important measure of the candidate was whether his faith and religion were aligned with theirs. Mitt being Mormon was catalytic to their rally around Mike. They further indicated that only 7% felt Governor Huckabee was electable and only 10% felt he had the necessary leadership experience to be POTUS. Unfortunately, a very sad commentary on the failings of the Iowa evangelicals, that they would vote principally on the basis of religion.