"First impressions are everything, and tonight the 2008 Democratic presidential candidates will take to the stage for their first debate," Norah O'Donnell said on MSNBC at 9am, kicking off a full day of political coverage.

"Throughout the day we'll have complete coverage of all the issues and the candidates," she said.

Anchors include David Gregory, Chip Reid, Peter Alexander, Joe Scarborough, Chris Jansing, and Amy Robach.

Tonight, the Hardball College Tour airs at 5pm, a debate preview hosted by Keith Olbermann and Chris Matthews airs at 6, the debate runs from 7 to 8:30, post-game coverage runs through midnight, and Scarborough concludes the day from 12 to 1am...