not have a super pac. and we are going to prove the experts wrong, because we're going to win this campaign. >> now, the only other democrat left, martin o'malley, basically called clinton a weather vane, and remember, despite her resurgence, she still has this looming fbi investigation over her server. and this friday the state department releases more of her e-mails as the drip-drip continues. chris? >> ed henry reporting from des moines. ed, thank you for that. now, to the republican race, where dr. ben carson is now the front-runner in iowa. he's also the author of a new book, a more perfect union. and dr. carson, welcome back to fox news sunday. >> thank you. good to be with you, chris. >> let's start with those new numbers out of iowa. a des moines register poll this week shows you now leading trump, 28% to 19%. a swing of 14 points in your favor since august.