Television personality and former White House staffer Omarosa Manigault Newman (AP Photo/Mary Altaffer)

Former White House aide Omarosa Manigault-Newman tore into her former boss Sunday, calling President Donald Trump a racist and a “performer” who she believes “wants to start a race war in this country.”

Manigault-Newman, speaking with the Rev. Al Sharpton on MSNBC’s “Politics Nation,” said Trump’s claim during his presidential campaign that he would promote diversity was all just a ruse to get votes.

“He was disingenuous about his commitment to diversity. He could care less if African-American civil rights leaders, anyone came to the table, because he had his agenda and that agenda did not include advancing and uniting the African-American community or even putting any policies in place that he promised during the campaign,” she said. “He’s a performer. He wants to use people as props.”

Asked whether she believes that Trump is a racist, she answered: “Yes, Donald Trump is.”

“I believe that he wants to start a race war in this country,” she added, though did not elaborate on that point.

The former White House aide stressed the small number of African-Americans who are working in his administration. She also accused his administration of trying to dismantle former President Barack Obama’s accomplishments.

“Donald Trump is not equipped to serve in the role that he is in,” she concluded. “I would say that he’s unfit to serve as the president of the United States. He has completely taken the presidency to the gutter.”

She is now promoting her book Unhinged about her time in the White House, and has said she has a trove of recordings to back up her claims.