This is from an interview after his Iowa victory. Huckabee is one of the three Republican presidential candidates who had expressed doubts about evolution. Well, here at least he is technically not saying anything wrong. Its just that our standards have gotten so low that we take any lack of hostility towards science, especially evolution, as a victory. The bit about evolution/creationism is roughly 2 and a half minutes into the interview.
And just for giggles, here is Ann Coulter on Huckabee's views on evolution (this is from couple of weeks back):