White House aide Kellyanne Conway publicly backed Donald Trump on Wednesday after an extraordinary 48-hour Twitter row between the president and her husband came to a head.

Mrs Conway used a cable news interview to insist she would not resign and rebuked her husband George for airing his views in public.

It follows two days during which Mr Conway and Mr Trump have traded blows on twitter in a war of words that has generated a slew of headlines.

It began earlier this week with Mr Conway, a prominent conservative lawyer, suggesting the president suffered from a narcissistic personality disorder in a string of tweets, adding "his condition is getting worse every day".

It led Mr Trump to issue a scathing response on Wednesday, tweeting: "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!"