Letterman Reacts to McCain Snub

He may have canceled an appearance on one CBS show, but Senator John McCain will appear for an exclusive interview on another.
Katie Couric gets the only evening news interview with Senator John McCain since his decision to temporarily suspend his campaign and his call to delay Friday's debate.
David Letterman says he was told McCain canceled because he had to go back to Washington, D.C., but his interview with Couric was happening as Letterman was being taped up the street.
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