The latest Public Policy Polling monthly poll has Mike Huckabee defeating President Obama 47-42, and other potential GOP candidates trailing the President:
Mike Huckabee is the only possible GOP contender polling ahead of Obama this month, at 47/44. Going from arguably most pleasant to most angry across the spectrum of leading Republicans you then have Obama ahead of Mitt Romney 46-43, Newt Gingrich 47-43, Sarah Palin 49-43, and Glenn Beck 48-39.
Huckabee is the only candidate we polled this month to post positive favorability numbers, at 35/32. That's because he's relatively inoffensive to Democrats with only 44% having an unfavorable opinion of him. Mitt Romney's favorability numbers are only slightly negative at 33/35. The rest of the GOP folks are highly unpopular with Beck's favorability at 31/41, Palin's at 38/52, and Gingrich's at 30/50.
Among the possible GOP candidates, Huckabee has for a long time consistently fared best against Obama.