David Letterman took aim at his former employer, CBS, over the cancellation of 'The Late Show With Stephen Colbert.

In the week after CBS/Paramount cancelling "The Late Show," Stephen Colbert repeatedly hit back — with backup from his rivals and David Letterman.

“The FCC’s approval of the Paramount-Skydance merger reeks of the worst form of corruption,” Sens. Ed Markey (D-Mass.) and Ben Ray Luján (D-N.M.) said in a joint statement. “The stench of this transaction will linger over the Commission for years.”

The FCC approved the transfer of CBS licenses to Skydance's ownership group, paving the way to the merger of Skydance and Paramount.