In Depth

McCain Cancels ‘Letterman’ Appearance

Presidential candidate Sen. John McCain, R-Ariz., who said he is suspending his presidential campaign to focus on the economic crisis, canceled his appearance on tonight's "Late Show With David Letterman.”

A spokesperson for "Late Show" said Keith Olbermann, the liberal host of "Countdown" on MSNBC, will fill the hole in the CBS show's lineup left by the McCain cancellation.

'LATE SHOW' VIDEO