CBS' shock announcement sparked speculation over whether there was a political motive for the program's cancellation.

The WGA has issued a statement calling for a bribery investigation following CBS' cancellation of 'The Late Show With Stephen Colbert.'

Colbert himself is a member of the WGA, as are 23 other people on the staff of "The Late Show." With the ending of Colbert's run -- and the outright cancellation of "The Late Show" -- so hot on the heels of a fiery monologue from the host earlier this week where he referred to Paramount's settlement with the president as a "big fat bribe,