President Trump turned up the heat Wednesday in his feud with George Conway, calling the spouse of adviser Kellyanne Conway a “stone cold LOSER & husband from hell!”

“George Conway, often referred to as Mr. Kellyanne Conway by those who know him, is VERY jealous of his wife’s success & angry that I, with her help, didn’t give him the job he so desperately wanted. I barely know him but just take a look, a stone cold LOSER & husband from hell!” Trump tweeted Wednesday morning.

In one of the more bizarre feuds of the Trump era, George Conway has repeatedly questioned the president’s mental health on social media, all while his wife continues to work at the White House.

He fired back within seconds Wednesday, tweeting: "You seem determined to prove my point. Good for you! #NarcissisticPersonalityDisorder."

He added: "You. Are. Nuts."

Conway revived their dispute last week by blasting Trump for a claim that the sentencing of former Trump campaign chairman Paul Manafort had exonerated the president from the Russian collusion piece of the probe.

“Have we ever seen this degree of brazen, pathological mendacity in American public life?” Conway tweeted. “One day he makes a harmless slip of the tongue, something any mentally balanced person would laugh off. But instead he lies about it. He denies what the world can see on videotape. Even his donors and supporters wonder, what is wrong with him? Why would he feel compelled to tell such an absurd lie?”

Trump 2020 campaign manager Brad Parscale initially responded by claiming he was just sour grapes.