Think about the economy:
If, as seems extremely likely, we will be knee deep in a recession come election day in November, what kind of candidate will do well? Or poorly, for that matter?
Huckabee is Mr. Folksy, and in a world where international trade and finance will be key, probably will suffer. He just doesn't come off as a detail guy, but rather as a provincial, which can't inspire confidence when considering the complex economic mess we will be in. So, the Democrats might want Huckabee to be the Republican presidential candidate this year.
I'm a die-hard atheist, but even I'll get down on my knees and beg the imaginary ghost in the sky to give Huckabee the nomination. His "Gimme That Old Time Religion" shtick will draw the rubes, but the average American will find it a turn-off.