Huckabee has surged because he won a couple of debates and hes got evangelical support. If a quick rise can happen to the liberal pro-life evangelical Huckster, it can happen to the conservative pro-life evangelical Hunter.
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According to Intrade, the winner of the December 12th GOP debate was... Duncan Hunter.
http://www.freerepublic.com/focus/f-news/1938773/posts
Why the smart money is on Duncan Hunter
http://www.freerepublic.com/focus/f-news/1926032/posts
In this poll Hunter is up 3% and even with Paul and Thompson.
http://www.wxyz.com/news/local/story.aspx?content_id=3481ef60-8195-46a9-af04-b87b907bcfdd
IMHO, the Huckabee rise has been more slow and steady. I first noticed Huckabee rising in the polls above the second tier candidates this summer.