U.S. President Donald Trump called senior adviser Kellyanne Conway's husband, George Conway, a "husban from hell!" on Twitter Tuesday morning - the latest insult in a long string of attacks.

Trump tweeted, "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!"

Conway quickly replied: "You. Are. Nuts."

Trump and Conway have been trading barbs on Twitter in the past few days since Trump 2020 reelection campaign manager, Brad Parscale, suggested George Conway only criticizes the president because he is “jealous” of his wife.

Parscale was responding to Conway’s suggestion on Twitter over the weekend, following a bizarre 48 hours of tweets from Trump, that the president was mentally ill.

Trump himself, never one to shy away from personal attacks or Twitter, retweeted Parscale with the comment, “A total loser!” Conway then replied saying, "Congratulations! You just guaranteed that millions of more people are going to learn about narcissistic personality disorder and malignant narcissism! Great job!"

The war of words began when Conway wrote, "*All* Americans should be thinking seriously *now* about Trump's mental condition and psychological state, including and especially the media, Congress—and the Vice President and Cabinet."

On Sunday, he added: "His condition is getting worse."

Read more: Trump’s 2020 Strategy: Politicize Israel, Demonize Ilhan Omar and Keep Voters at Home

Conway then tweeted screengrabs showing the medical definitions of narcissistic personality disorder and antisocial personality disorder from the Diagnostic and Statistical Manual of Mental Disorders.

Kellyanne Conway publicly disagreed with her husband over Trump for the first time, saying, "No, I don't share those concerns."

Parscale tweeted on Monday, “We all know that @realDonaldTrump turned down Mr. Kellyanne Conway for a job he desperately wanted. He barely worked @TheJusticeDept and was either fired/quit, didn’t want the scrutiny? Now he hurts his wife because he is jealous of her success. POTUS doesn’t even know him!”