I may have to rethink my earlier posting. Obama started weak tonight, but has reeled off a number of impressive answers in the last hour. Asked if Hispanics are less willing to support a black candidate, he scored a standing triple by retorting, "Not in Illinois. They all voted for me." He's been substantive, smooth, and on message most of the night.
Clinton and Edwards have also done well, though Edwards has been on the defensive a couple times, once again having to explain his reversals on votes while in the Senate. To give himself a glimmer of hope, he needed to have a great debate, and he hasn't.