Mitt Romney's primary problem (no pun intended) with conservative Evangelicals is not so much a question of his being a Mormon... though that doesn't help him much either, since Mormons are considered to be a religious cult by Evangelicals (and with good reason). However, I think given a choice between Rudy Giuliani, they would pick a good Mormon in a heartbeat. But Romney's biggest problem is that on the issues that matter to conservative Evangelicals... he has not been a good Mormon. He has supported abortion and gays in the military... he has changed his mind... so he says, but inconsistency on these issues is the primary reason why Huckabee is quickly becoming the candidate for those who see these moral issues as the biggest issues when selecting a candidate.
And aside from that, Huckabee has a sense of humor: