“I think it’s very troubling [Trump] has said, ‘I can’t lose unless there’s fraud,’” Bolton told Jake Tapper. “Of course he can lose in an honest election.”

Bolton warned: “Let’s be clear: Trump will not leave graciously if he loses. He will not leave graciously. Whether he carries it to the extreme, I don’t think we know.”

Trump has refused to commit to a peaceful transfer of power, despite repeated requests to do so.

Ultimately, Bolton said, what happens will be “on the leadership of the party, elected officials, private citizens. If it is clear what the outcome [of the election] is, it is up to Republicans, not Democrats, to say, ‘This is on us. He’s got to go.’”