David Letterman delivered a fiery rant against CBS and parent company Paramount for cancelling Stephen Colbert’s “Late Show,” calling the decision “gutless” and “pure cowardice” as he labeled his successor a martyr of the network.

Since then, Colbert has been ripping into Donald Trump with renewed relish, often while also flaying CBS and its parent company, Paramount. By doubling down on attacking his most powerful enemy, at a time when network execs are facing such intense scrutiny for what many believe was a politically motivated firing,