The accusations are among a long list of scandalous claims contained in her new book, "Unhinged", set to come out August 14.
Manigault Newman also claims Trump repeatedly uses the racially offensive N-word, including on an occasion when he was taped, and has threatened to reveal the names of illegitimate children he has allegedly fathered.
According to the Post, an excerpt from Unhinged also claims that Lara Trump, the President's daughter-in-law, and adviser offered Omarosa a job after she was sacked from The White House. Early excerpts have been denounced by White House officials, who are launching a concerted effort to discredit their former colleague.
She told him to forget about it and writes that "we laughed, he wanted me to believe he was kidding". She acknowledges she had never been able to obtain or hear the tapes but said three unnamed sources had described their contents.
The president tweeted about the event, saying "hundreds of bikers for Trump just joined me in Bedminster" and called them great people who love our country. But that offer came along with a stringent nondisclosure agreement that was as "harsh and restrictive" as she had seen while working in television.
Tiger Woods has brief practice, recovering physically before PGA Championship
Woods, a 14-time major champion, has not won a major since the 2008 US Open and hasn't won any event since the 2013 Bridgestone Invitational.
Manigault Newman went on to become Assistant to the President and Director of Communications for the Office of Public Liaison.
One of Newman's more noteworthy allegations is that Trump is "a racist, a bigot and a misogynist" whose mental stability is in "decline". At the time, a source familiar with her departure told the Guardian that she had always been uncomfortable defending the Trump administration as the most prominent African American woman in the White House.
The White House responded by slamming the book and its author and chastising the press for writing about it. The White House says the book is "riddled with lies and false accusations".
"Hearing it changed everything for me", she told NPR reporter Rachel Martin. According to a published report by the media organization, when asked to clear up the discrepancy, the former White House aide said Martin must not have read the book.