She worked in the Trump administration, but Omarosa Manigault NewmanOmarosa Onee Manigault NewmanJuan Williams: The GOP's problem with women of color Trump administration sought to sue Omarosa after she announced tell-all book: report Juan Williams: Too many men of color got conned by Trump MORE is predicting that Joe BidenJoe BidenAzar in departure letter says Capitol riot threatens to 'tarnish' administration's accomplishments House Democrats introduce measures to oppose Trump's bomb sale to Saudis On The Money: Retail sales drop in latest sign of weakening economy | Fast-food workers strike for minimum wage | US officials raise concerns over Mexico's handling of energy permits MORE will win the presidential election and says she'll be among those casting a ballot for the Democratic presidential nominee.

"I certainly believe that Biden-Harris will win on Tuesday," she told "Extra" in an interview Monday.

Manigault Newman — a former contestant on the Donald Trump-hosted "The Apprentice" — was hired by the then-real estate developer's campaign in 2016 and later joined the White House. She left in 2017 and published a tell-all book, "Unhinged," in 2018, which accused President TrumpDonald TrumpCIA chief threatened to resign over push to install Trump loyalist as deputy: report Azar in departure letter says Capitol riot threatens to 'tarnish' administration's accomplishments Justice Dept. argues Trump should get immunity from rape accuser's lawsuit MORE of using racist and misogynist language about Black people and women.

ADVERTISEMENT

If Trump loses the White House race, he will "make life very, very difficult for us," Manigault Newman said.

"It’s going to be a tumultuous transition. Trust me," she added.

Asked by "Extra's" Cheslie Kryst if she saw a change in Trump once he entered the White House, Manigault Newman replied, "The power went straight to his head."

She called it a "special moment" to see Sen. Kamala HarrisKamala HarrisOn The Money: Retail sales drop in latest sign of weakening economy | Fast-food workers strike for minimum wage | US officials raise concerns over Mexico's handling of energy permits Biden scolds Republicans for not wearing masks during Capitol attack Biden and the new Congress must protect Americans from utility shutoffs MORE (D-Calif.) — like the ex-reality TV star, a graduate of Howard University — run alongside Biden as the vice presidential nominee.

When questioned about who she would be voting for, Manigault Newman said, "I don’t think you should ever ask anyone who they voted for" before telling the entertainment news show, "Just know that I voted for the graduate of Howard University, because I'm a Bison through and through!"