David Letterman roasts John McCain for skipping out on 'Late Show'

Baa Daa Boom. CBS "Late Show" comic David Letterman gave John McCain a serious roasting Wednesday night for scrubbing an appearance roughly one hour before the taping.

"This just doesn't smell right. This is not the way a tested hero behaves," Letterman ranted. "Somebody's putting something in his Metamucil."

He mocked McCain's "suspension" of his campaign, asking, "Are we suspending it because there's an economic crisis or because the poll numbers are sliding?"

Letterman said McCain phoned him to cancel because he was rushing back to Washington to deal with the economic crisis. But at the time of the taping, McCain was nearby doing an interview with CBS News' Katie Couric.

Showing a video clip of McCain getting his makeup, Letterman sneered, "He doesn't seem to be racing to the airport, does he?

"It's like we caught him getting a manicure or something," he said.

Bada-boom.