…from Rasmussen:

Forty-nine percent (49%) of Evangelical Christians now support Huckabee in Iowa. While still a very high level of support, it’s down from 62% a week ago. Among other Protestant voters, Huckabee now earns 17% support, down from 33%. Romney attracts a plurality of these Protestant voters with 30% support and McCain earns 18% of their vote.
Romney leads Huckabee among men but trails among women. Among those who have participated in the caucuses before, it’s all even–Huckabee 26% and Romney 26%.
Sixty-two percent (62%) of Likely Caucus participants say they are certain they will not change their mind before January 3. That includes 65% of Huckabee supporters, 58% of those who prefer Romney, and 55% of McCain voters.
Among those who say there’s a good chance they could change their mind, Thompson and Huckabee top the second choice list.
Among those likely to take part in the Iowa Republican caucuses, 67% now have a favorable opinion of Huckabee. That’s down from 81% a week ago and 76% in late November. The number with a Very Favorable opinion has fallen from 51% to 38% over the past week.
Romney is viewed favorably by 73%, Thompson by 77%, and McCain by 63%. That last figure reflects a six-point gain for McCain.
Just 58% now have a favorable opinion of Giuliani. That reflects a continuing downward trend from 74% a month ago.