David Sorensen has become the second aide to resign in President Donald Trump administration. Sorensen denied his former wife’s allegations that he was violent and emotionally abusive.
His departure comes just days after another Trump official, Rob Porter, quit over allegations of abuse from two ex-wives, something he denies.
Questions have been raised over how long it took the White House to act on the accusations facing Mr Porter.
Mr Sorensen’s ex-wife Jessica Corbett told the Washington Post that he was physically abusive to her while they were married.
She said that on separate occasions her former husband ran a car over her foot, threw her against a wall and extinguished a cigarette on her hand.
In response, Mr Sorensen released a statement in which he said he had “never committed violence of any kind against any woman in my entire life” and that instead it was he who had been physically abused.
He said he was considering legal action, but said he quit because he “didn’t want the White House to have to deal with this distraction”.
White House officials said they learned of the accusations by Mr Sorensen’s wife late on Thursday.
“We immediately confronted the staffer, he denied the allegations and he resigned today,” deputy press secretary Raj Shah said.
Allegations of domestic abuse against Mr Porter involving two ex-wives surfaced on Tuesday.
It is alleged that the former White House staff secretary gave one ex-wife a black eye while another filed a restraining order. He denies the allegations.
On Friday, Mr Trump paid tribute to Mr Porter, who quit his White House position on Wednesday.
Speaking in the Oval Office Mr Trump said: “We found out about it recently and I was surprised by it, but we certainly wish him well and it’s a tough time for him.”
But Mr Trump did not refer to Mr Porter’s accusers.
His comments sparked criticism from Democrats, with former Vice-President Joe Biden saying Mr Trump had downplayed the allegations against Mr Porter.
“That’s like saying: ‘That axe murderer out there, he’s a great painter'”, Mr Biden said.