Sarah Palin puts her toe in the water in Iowa and Robert Gibbs calls her:

“a formidable force in the Republican Party and may well be, in all honesty, the most formidable force in the Republican Party right now.”

On the other hand:

“While popular among conservatives, Palin still has a long way to go with other Americans. A CBS News poll on Thursday said 46 percent of American voters viewed Palin unfavorably, compared with 21 percent who have a favorable opinion of her and 33 percent who are undecided.”