President Donald Trump lashed out at former White House aide Omarosa Manigault Newman calling her "that dog" after she accused him of being a racist.
The former Apprentice star has released a string of secret recordings from her time in the White House and has claimed Mr Trump has previously been recorded using racial slurs.
In response, Mr Trump tweeted on Tuesday: "When you give a crazed, crying lowlife a break, and give her a job at the White House, I guess it just didn’t work out. Good work by General Kelly for quickly firing that dog!"
Mr Trump’s rhetoric is surprising given Ms Manigault Newman had been one of the president’s most prominent black supporters and is now accusing him of using derogatory language about African Americans.
The feud between the pair has been escalated in recent days after Ms Manigault Newman released several tapes as she promotes her tell-all book about her time in the White House.
In recent days, Ms Manigault Newman has released audio of her firing by John Kelly, the White House Chief of Staff, and a call from Mr Trump in which he says he is sorry to hear she has been dismissed.
On Tuesday, CBS News released another recording it said was unverified but appeared to be Ms Manigault Newman and several Trump campaign aides in October 2016 discussing a tape of Mr Trump using a racial epithet during the taping of "The Apprentice."
CBS News’ parent company, CBS Corp, owns Simon and Schuster Inc, which published her book. The book, Unhinged, also describes the conversation.
The recording appears to show Ms Manigault Newman discussing with Trump campaign aides Katrina Pierson and Lynne Patton how to respond to the remarks.
"I’m trying to find out at least what context it was used in, to help us maybe try to figure out a way to spin it," a woman, identified as Ms Pierson, can be heard saying.
"He goes, ‘how do you think I should handle it,’ and I told him exactly what you just said, Omarosa," Ms Patton says, "which is ‘well, it depends on what scenario you’re talking about.’ And he said, ‘well, why don’t you just go ahead and put it to bed.’"
When you give a crazed, crying lowlife a break, and give her a job at the White House, I guess it just didn’t work out. Good work by General Kelly for quickly firing that dog!
— Donald J. Trump (@realDonaldTrump) August 14, 2018
"He said it," Ms Pierson interjects. "No, he said it. He’s embarrassed."
Before the recording was made public, Ms Pierson denied having a conversation about an alleged "n-word tape" on Fox News. Ms Patton also denied the allegations in a statement.
"To be clear, at no time did I participate in a conference call with Katrina Pierson advising me, Jason Miller and Omarosa Manigault-Newman that Frank Luntz had heard President Donald J. Trump use a derogatory racial term – a claim that Luntz himself has also denied," Ms Patton said, referring to a passage in Ms Manigault Newman’s book.
"It should be abundantly clear to everyone that not only is her book a complete work of fiction, but that the existence of this elusive ‘N-word’ tape is a figment of her imagination and merely a destructive tool of manipulation applied only when it best serves her interests."
Mr Trump has vehemently denied using the N-word, saying the show’s former producer, Mark Burnett, had called to confirm that no such tape existed.
Ms Manigault Newman has hinted that she has several more tapes of conversations with White House staff and is willing to hand them over to the Special Counsel’s Office investigating alleged Russian collusion in the 2016 presidential election.
Mr Trump’s re-election campaign announced on Tuesday that it is taking legal action against Ms Manigault Newman over her public bashing of the president.
The campaign has filed for arbitration against the former White House aide arguing that she has violated a confidentiality agreement she signed in 2016, while she was still a member of Mr Trump’s presidential campaign.
The claim, filed with the American Arbitration Association in New York, highlights statements Ms Manigault Newman made during her time on Mr Trump’s campaign as well as in the White House, as well as her recent release of several tape recordings of White House officials.
“President Trump is well known for giving people opportunities to advance in their careers and lives over the decades, but wrong is wrong, and a direct violation of an agreement must be addressed and the violator must be held accountable,” a campaign official told The Washington Examiner.