If I had a show, I would have gone right after him. I would have said something like, “Hey, nice to see you. Now, let me ask you: what gives you the right to make fun of a human who is less fortunate, physically, than you are?” And maybe that’s where it would have ended. Because I don’t know anything about politics. I don’t know anything about trade agreements. I don’t know anything about China devaluing the yuan. But if you see somebody who’s not behaving like any other human you’ve known, that means something. They need an appointment with a psychiatrist. They need a diagnosis and they need a prescription.Read more from Letterman on Trump here.