"He committed to it, it was consistent, and it worked."
Maher is speaking as a standup comedian, knowing how hard it is. Halfway through the video clip at the link, Jason Alexander — wearing William Shatner's toupee — breaks in to say famous people could "urinate" on themselves and people would accept it as a good routine. Maher says no, at most they'd give you 1 minute to get funny; Eastwood worked that comic routine 10 minutes, successfully, and that was impressive. And Maher loathes Eastwood's political position. So that's impressive.
Also on last night's show, Maher talked to Dinesh D'Souza about his movie "2016: Obama’s America."