By Marianne Garvey, CNN

(CNN) -- David Letterman can't believe he had Donald Trump on as a guest more than 30 times on his former late-night talk shows, "Late Night With David Letterman" and CBS' "The Late Show With David Letterman."

The "My Next Guest Needs No Introduction" host told The Hollywood Reporter's 'Awards Chatter' podcast that despite all the invites and interviews, he is no longer a fan of the 45th president.

In fact, he says Trump's off his rocker.

"More than 30?" Letterman exclaimed when he was told how many times Trump had been his guest. "Wow! You're welcome, America. I think he just liked being on TV. I had no sense that he was the soulless bastard that he's turned into."

When asked if he would talk to Trump today, Letterman said "I would."

"I would just like to say, 'Don, it's Dave. Remember me? I want to talk to the real Donald Trump.' Because I now don't know which is the real Donald Trump, and if the Donald Trump that I was talking to [back then] was the real Donald Trump, how do you get to be the guy he is now?" Letterman said. "Politics notwithstanding -- let's just say everything is great and he's done a great job, but he still behaves the way he behaves -- who behaves like that?!"

Letterman went on to label Trump "psychotic."

"He used to be kind of like the boob of New York that pretended to be wealthy, or we thought was wealthy, and now he's just a psychotic. Is that putting too fine a point on it?" he asked. "I don't even care if it's recorded, I would just like to talk to the guy, because, as I said before, he knows me, I know him -- what the hell went wrong?!"

"My Next Guest Needs No Introduction" is currently streaming on Netflix.