Bernie Sanders: Donald Trump is a pathological liar

GEORGE STEPHANOPOULOS: Opening moments last night with Senator Bernie Sanders. He joins us live here in New Hampshire this morning. I’m going to get to that in a second, but first you just heard Donald Trump call you out. He said you lied. He doubled down on that embrace from Vladimir Putin.

BERNIE SANDERS: I tell you, it really is rather extraordinary. I think — and I say this straightforwardly — I think you have a pathological liar there.

GEORGE STEPHANOPOULOS: Pathological.

BERNIE SANDERS: Pathological, I really do. I mean, I think much of what he says are lies or gross distortion of reality. Here’s the fact. I mean, he’s been saying over and over again that he saw on television, as I understand it, thousands of people in New Jersey celebrating 9/11 right the destruction of the Twin Towers.

Either that’s true or it’s not true. And what I understand, there have been a lot of research, they archive what goes on television.

You’re a TV guy, right? Everything was saying that was going to be archived.Either it is true, it is not true. Nobody has seen a tape of thousands of people celebrating the destruction of the Twin Towers in New Jersey. It doesn’t exist. And he keeps claiming it. That’s called pathological lying.

Transcript courtesy of ABC News’ This Week