The accusations are among a long list of scandalous claims contained in her new book, "Unhinged", set to come out August 14.
President Donald Trump on Saturday lashed out at former "Apprentice" contestant and White House aide Omarosa Manigault Newman after reports circulated on Friday that her forthcoming book Unhinged portrayed him as a racist.
Because of his alleged use of racial slurs - particularly the N-word - Manigault Newman concluded that he is a racist and a bigot, according to the Associated Press.
Manigault Newman was previously best known for her polarizing character on NBC's "The Apprentice". Apparently, she's got some secretly recorded audio of Trump that she's already shared with her close friends and will release in her book, which will be called Unhinged. While she doesn't provide direct evidence, she cites three unnamed sources who attest to the existence of the tape.
The former reality television star reportedly writes that Trump played the comments off as a joke, but she says she believes he was serious, according to the excerpt obtained by Slate.
She also claims Trump's campaign offered her a contract for $15,000k a month to keep quiet about her time in the administration, The Hill reported.
She said: 'I was told exactly what Donald Trump said - yes, the N-word and others in a classic Trump-goes-nuclear rant - and when he's said them.
White House press secretary Sarah Sanders said: 'This book is riddled with lies and false accusations. "It's sad that a disgruntled former White House employee is trying to profit off these false attacks, and even worse that the media would now give her a platform".
Throughout the book, Manigault Newman paints a deeply critical portrait of the president, describing him as a man who "loved conflict, chaos and confusion; he loved seeing people argue or fight".