A new Iowa Poll finds that Sarah Palin has a 68 percent favorable rating among Iowa Republicans, "making her a credible candidate for the 2012 caucuses should she decide to run for president," the Des Moines Register finds.

But Palin doesn't score as well as Mike Huckabee, who has a 70 percent favorable rating and is viewed unfavorably by just 12 percent of Iowa Republicans. Palin's unfav number is double that -- 24.

Among Iowa voters overall you see why Palin is such a lightning rod, as she is the only potential Republican candidate with a net-negative favorable rating. And 30 percent view her very unfavorably, compared to 12 percent who view her very favorably.

Favorable Ratings
Huckabee 53 / 22
Palin 37 / 50
Gingrich 42 / 36
Romney 40 / 31
Pawlenty 17 / 10
Jindal 16 / 10
Pataki 16 / 14

The Iowa Poll was conducted for the Register by Selzer & Co. among 800 Iowa voters from November 8-11, and has a margin of error of +/- 3.5 percent.