The new Rasmussen poll has Mike Huckabee opening up a lead in South Carolina, albeit not as big as the one in today's SurveyUSA poll. Here are the numbers, compared to their last poll from three weeks ago:

Huckabee 28% (+5)
McCain 21% (+9)
Romney 15% (-8)
Thompson 11% (-1)
Giuliani 10% (-1)