David Letterman

Including Franken "would distract from the show’s purpose as a celebration of American humor," PBS said.
The two rockers talked pre-concert rituals and spooky experiences.
The former host was praised for his imagination, comic daring and heart.
America Ferrera, Amy Schumer, Kumail Nanjiani and Judd Apatow are just some of the famous faces joining in.
The former secretary of state then explained what Trump should have said.