Hillary Rodham Clinton's campaign is emphasizing a CNN poll that shows her slightly ahead. But Barack Obama -- shown ahead in a Des Moines Register poll -- told supporters today in Des Moines he is on the brink of "doing something very, very special" on Thursday.
On the Republican side, Mike Huckabee, who is in a close race with Mitt Romney in Iowa, is back out campaigning after deciding to show a negative ad to the media instead of putting it on the air.
