Citing his “grandiose notion of self-worth, pathological lying, lack of empathy and remorse,” former Obama campaign chief David Plouffe called Donald Trump a “psychopath” in an interview on NBC News.

Said Plouffe: “I think the assessment was that Donald Trump would try and do some things to appeal to the middle of the electorate, to appeal to suburban college-educated women. He’s not. I mean, basically, we have a psychopath running for President. I mean, he meets the clinical definition, okay?”

David Plouffe warned that Democrats should not underestimate Donald Trump, arguing that he would be more dangerous than Sen. Ted Cruz, Politico reports.

Said Plouffe: “We’ve never seen anything like this in politics. Democrats should not be popping champagne corks since Donald Trump is doing so well.”

For members: Why Democrats should not underestimate Trump

Democratic strategist David Plouffe told Politico that Republican efforts to coalesce around one alternative to Donald Trump are too little too late.

Said Plouffe: “It needed to happen two, three weeks ago.”

He added that the GOP nomination is completely in Trump’s control: “If he can land the plane, he wins.”