And it's making headlines around the world.
It wouldn't be the first time the former Apprentice star has been fired from the Trump camp.
She went on to write a book, The Bitch Switch in 2008, a self-help book on "how to turn on (or turn off) that bitch switch". It's unclear if Trump was made aware that she would be leaving the White House.
And others claimed she was "unprofessional".
Manigault Newman's exit comes at the front end of what's expected to be a wave of departures.
During Mr Trump's campaign, she was the director of African-American engagement, and "responsible for engaging faith leaders, or rights leaders, the community as a whole to making sure their issues were addressed".
Interested in Trump Administration?"It is the ultimate revenge to become the most powerful man in the universe", she said.
"At the time he stepped up to announce that, he was a private citizen coming from the private sector, [who] was going to run to be President", she said. Who ever disagreed, who ever challenged him. "I don't know which it is".
Manigault Newman, who earned the top-level staff annual salary of $179,700, was, along with Housing and Urban Development Secretary Ben Carson, one of two black officials among Trump's more than three dozen cabinet members and senior staff.
White House press secretary Sarah Sanders said: "We wish her the best in future endeavours and are grateful for her service". She was "vulgar", allegedly, and "cursed", and reminded Kelly that she helped get Trump elected. The president was slow to condemn the hate groups and suggested "both sides" were to blame for the violence.
Sources close to Omarosa tell us she started thinking about resigning back in August after the Charlottesville riots, because she disagreed with Trump's handling of the crisis. The first chief of staff, Reince Priebus badly wanted to fire her but was unable to do so.
Manigault, 43, sparked controversy earlier this year, according to Politico, when she brought her 39-person bridal party to the White House for an "extended wedding photo shoot".
In 2013, Mr. Trump tweeted that Newman, "always promises and delivers high drama".