Sarah Palin could expect a lot of support in Iowa's Republican caucuses if she launched a campaign for the 2012 presidential nomination, according to The Des Moines Register's Iowa Poll.But the rising national figure, who is scheduled to stop in Iowa next month on her national book tour, would also have to contend with a lot of doubts about her - unlike her potential rivals, the poll found.The first public poll to test Palin's favorabilty in the leadoff nominating state found 55
percent of all Iowans hold an unfavorable opinion of Palin a little more than a year after the last election. Only 37 percent feel favorably about her.