David Letterman recently appeared on Jimmy Kimmel Live! In the episode, the comedian opened up about the current challenges faced by late night talk shows.

Jimmy Kimmel on Wednesday zeroed in on a bizarre moment in President Donald Trump ’s Pennsylvania speech, summing it up with quite the zinger.

"A guy comes up to me and he says, 'Excuse me are you who I think you are?' And now, I'm all loaded up and I respond, 'Well, that depends on who you think I are.' That always gets a big laugh," the TV...