A former White House staffer is claiming in a new book that President Donald Trump has exhibited a "mental decline that could not be denied."
An excerpt from Omarosa Manigault Newman's new book was published Thursday by DailyMail.com.
The former reality television star, who appeared on Trump's "The Apprentice" and later served as an assistant to the president, says in the book she was disturbed by a famous interview Trump gave to Lester Holt.
U.S. & World
Stories that affect your life across the U.S. and around the world.
She writes that, while watching the interview on television, she "realized that something real and serious was going on in Donald's brain" and that his "mental decline could not be denied."
She says, "I kept thinking, `Oh no! Oh no! This is bad!"
The White House did not immediately respond to a request for comment.
Manigault Newman's book, called "Unhinged," is being published by Gallery Books and will be released on Aug. 14.
Last week, Manigault Newman tweeted "#ComeClean45" and shared a link to the book listing on Amazon promoting pre-order sales.
The publisher's accompanying blurb said that after a 15-year relationship with Trump that spanned television shows, the 2016 campaign and the president's first year in the White House, Manigault Newman "is finally ready to share her side of the story in this explosive, jaw-dropping account."
The tome promised a "stunning tell-all and takedown from a strong, intelligent woman who took every name and number," according to the blurb.
The rare black woman in Trump's administration, Manigault Newman has likened her departure to being freed from a "plantation."