And Manigault Newman put some of the problems she described on stark display Sunday, surfacing a tape she surreptitiously recorded in the White House Situation Room.
The former aide to President Trump did not specify exactly when the tape was purported to have been recorded, but said it was from the POTUS' time as the host of the corporate reality TV show The Apprentice. She said Sunday that she personally listened to it after her book had gone to press.
She said: "It confirmed what I feared the most: that Donald Trump is a con and has been masquerading as someone who is actually open to engaging with diverse communities; but when he talks that way, the way he did on his tape, it confirmed that he is truly a racist".
"I was complicit with this White House in deceiving this nation", she admitted". "You don't know that you're in that situation until it just keeps bubbling and bubbling".
A number of journalists, national security experts and former White House staff raised alarms about the dangers of recording in the Situation Room - the highly sensitive space where phones and electronic devices are prohibited for security reasons.
In the purported recording, which would constitute a serious breach of White House security, Kelly is heard complaining about her "significant integrity issues" and saying that he wants to make her departure "friendly" and without "any difficulty in the future relative to your reputation".
Manigault-Newman, 44, gained renown as a villain on Trump's reality show "The Apprentice" and two of its spin-offs.
"I protected myself because this is a White House where everybody lies; the president lies to the American people, [the press secretary] Sarah Huckabee stands in front of the country and lies every day".
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The former England boss took up the reins in September previous year with Palace bottom of the table and without a win from their first four matches.
Katrina Pierson, a former Trump campaign spokeswoman, said Manigault Newman is embarrassing herself by "creating salacious lies and distortions".
People close to the White House said that she was a hard colleague and that despite complaining of being blackballed by Kelly, Manigault Newman had indicated to incoming West Wing staff during the transition that they could face bad press if they did not give her a prominent role.
Manigault Newman had indeed been a staunch defender of the president for years, including pushing back, as the highest-profile African-American in the White House, on accusations that he was racist.
Newman also provided "Meet the Press" with an audio recording she said was made in 2017 when White House chief of staff John Kelly fired her. I wanted to see the best in him.
She called on the White House to release her personnel file to clear her name. "I had a blind spot when it came to Donald Trump".
Conway said "that is not what was offered" to Manigault Newman.
White House counsellor Kellyanne Conway also questioned Manigault Newman's credibility in an interview Sunday on ABC's This Week.
The response from the White House was stinging. She later declined an offer to work on Trump's 2020 campaign and did not sign a confidentiality agreement.