John McCain, who announced yesterday afternoon that he was heading back to Washington D.C. to work on the bailout plan and temporarily suspending his campaign starting tomorrow, ended up canceling his appearance on The Late Show with David Letterman. Letterman wasn't too happy about that—especially since McCain was at the CBS News studios for an interview with Katie Couric. Watch the clip (Letterman sees a live feed of McCain getting makeup for his interview with Couric around 7 minutes in):

Letterman told his audience, "You don't suspend your campaign. This doesn't smell right. This isn't the way a tested hero behaves." He added, "What are you going to do if you're elected and things get tough? Suspend being president? We've got a guy like that now!" [via reader just_sayin.]

And the Commission on Presidential Debates issued a statement:

The Commission on Presidential Debates (CPD) is moving forward with its plan for the first presidential debate at the University of Mississippi in Oxford, MS this Friday, September 26.

The plans for this forum have been underway for more than a year and a half. The CPD’s mission is to provide a forum in which the American public has an opportunity to hear the leading candidates for the president of the United States debate the critical issues facing the nation. We believe the public will be well served by having all of the debates go forward as scheduled.

It's unclear what will happen with McCain's participation—his camp wants the first debate to take place during the vice-presidential debate slot on October 2nd in St. Louis, MO and reschedule the VP debate to another time. Oh, and Sarah Palin might also suspend her campaign.