Once again showed himself to be plain spoken, thoughtful, earnest, and pleasantly soft edged - all good fits for Iowa. Went populist on health care and got to talk about his impressive weight loss. Likely made a good impression on the casual voters just tuning into the race, and solidified the support that has been growing slowly but steadily after each strong debate performance. If he were running for governor of Iowa, he would be in excellent shape.
— Mark Halperin