Manigault Newman's most explosive claim is that she has evidence of the president using racial epithets like the N-word.
In a series of tweets Monday, the president called Omarosa "wacky" and noted she now got fired for the last time. "She never made it, never will", Trump tweeted on Monday, admitting that his response to her claims were "not presidential".
After Manigault Newman told Trump she had been fired, he responded: "No, nobody even told me about it". Trump allies have called for Manigault-Newman to be prosecuted, but legal experts say there is no legal basis to criminally pursue Manigault-Newman.
In the phone call, Trump is first heard saying: "Omarosa what's going on?"
"Gen. Kelly came to me and said that you guys wanted me to leave", Manigault Newman replied. You are incredible, okay, and i just want to thank you very much for everything you've done. I did not know that.
"I heard his voice as clear as you and I are sitting here", she said on the show.
"Nobody even told me about it", Trump is heard saying, after chief of staff John Kelly terminated her employment. According to her, there are "protections afforded" to her for blowing the whistle on those in the White House.
Manigault Newman, who was dramatically fired from the West Wing past year by chief of staff John Kelly, claims she has a recording of the conversation of Kelly attempting to fire her, as well a recordings of conversations with the president.
Spokeswoman Sarah Sanders on Sunday also said the recordings, including one in the White House's secure Situation Room, showed "a blatant disregard for our national security".
Todd asked why she did not come to this conclusion sooner, noting that Trump had said many things over the years that people considered racist, including calling Mexicans "rapists" or saying that "both sides" were to blame for bloodshed during the white nationalist march in Charlottesville last year.
The Associated Press purchased a copy of the book ahead of its release.
"I have heard the tape", she said, adding that three sources she talked to for her book relayed the same story.
Trump Jr. had downplayed the meeting, saying that it was about adoption policy as related to American sanctions on Russian Federation and describing it as a "waste of time".
And she took issue with the way in which the meeting to discuss her departure from the White House was handled, telling NBC's Savannah Guthrie, "It's not acceptable for four men to take a woman into a room, lock the door, and tell her that she can not leave".
"It's good to see that there is someone in that position since Omarosa has been gone for a long while", he said.
On Sunday, Manigault Newman did not address those issues. It was later reported that she was actually fired from her position.
After a delay of about 20 minutes, Trump resumed his offensive against her.
Former White House aide and reality television participant Omarosa Manigault Newman played a recording in a TV interview on Sunday of her dismissal and indicated she had other recordings from her time in the Trump administration.
Indeed, it's likely that Manigault-Newman violated only Situation Room policies, which prohibit cellphones, and other security rules and regulations - not the law.