Ms. Manigault Newman - who first gained fame as a contestant on Trump's reality show "The Apprentice", and then secured a $180,000-a-year staff job at the White House - released a recording of a private conversation she had with the president after she was sacked.
One administration official said Monday that there isn't a belief in the White House that Manigault Newman poses a larger national security risk after taping her conversation with Kelly in the Situation Room since she wasn't part of any classified or secret discussions of a national security nature during her time in the West Wing.
"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", Trump tweeted.
Earlier, the president accused Manigault Newman as "wacky" and "not smart" after his former co-star revealed her recording of a phone conversation with him.
Manigault Newman answered, "Well, absolutely".
Repeatedly, the disgraced former aide tried to hammer home her theme that in her mind, Trump is incompetent and untruthful. "I'm starting to think either none of this happened or they all at pieces of paper".
"I loved him [talking to her] on the phone". As a senior staff and assistant to the President I have seen things that have made me uncomfortable, that have upset me, that have affected me deeply and emotionally. But she insisted she "never signed that draconian NDA that they presented to me when I walked into the White House".
At one time she was one of Mr Trump's most vocal backers, but since her sacking Ms Manigault-Newman has been vocal in objecting to the Trump administration and also returned to reality TV, competing on Celebrity Big Brother in February this year.
"If we make this a friendly departure...you can look at your time here in the White House as a year of service to the nation and then you can go on without any type of difficulty in the future relative to your reputation", Kelly tells her.
"He has not gone far enough", Cummings said.
In the recording, which the Associated Press independently listened to, Kelly is heard saying he wants to talk with Manigault Newman about leaving the White House. "[But] this tape shows him saying, 'I didn't know you were fired.' Is he lying?"
Dana Perino, who served as press secretary to President George W. Bush, said Newman exhibited "outrageous" behavior by taking a recording device into the Situation Room, where nothing is supposed to be taped. She has defended her decision to secretly record it and says she has recorded additional White House conversations that she might be releasing as well. "And as a result, I resigned", she said. "I actually do think she's well advised to get legal counsel".
Manigault Newman said she turned it down.
"Wacky Omarosa already has a fully signed Non-Disclosure Agreement!" he wrote. "And the bottom line is, I can tell you for a fact she was complicit, but she also did the bidding, and she wanted to prove that she was in their camp because she used to be a Democrat".