Letterman Mocks McCain Cancellation

Sen. John McCain was scheduled to appear on Latenight with David Letterman tonight ... but it seems the Senator won't be there.

David Letterman tells audience that McCain called him today to tell him he had to rush back to DC to deal with the economy.

Then in the middle of the taping Dave got word that McCain was, in fact just down the street being interviewed by Katie Couric. Dave even cut over to the live video of the interview, and said, "Hey Senator, can I give you a ride home?"

Earlier in the show, Dave kept saying, "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 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!"

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