Letterman Rips McCain

McCain used the "I have to go back to DC and save the economy" excuse to cancel an appearance on Letterman...and then Dave finds out during the taping of his show that McCain is down the street being interviewed by Katie Couric.

Which prompted these comments from Dave:

"He can't run the campaign because the economy is cratering? Fine, put in your second string quarterback, Sara Palin. Where is she?"

"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!"

"You don't suspend your campaign. This doesn't smell right. This isn't the way a tested hero behaves." And he joked: "I think someone's putting something in his metamucil."

He also offered to give McCain a ride home.