Late night host Stephen Colbert mocked the allegations against President TrumpDonald John Trump2020 Democrats spar over socialism ahead of first debate Senate passes .5 billion border bill, setting up fight with House 'Teflon Don' avoids the scorn of the 'family values' GOP — again MORE made in former White House aide Omarosa Manigault NewmanOmarosa Onee Manigault NewmanOn The Money: Powell asserts Fed's independence amid new Trump attacks | House approves 3 billion spending package | CBO projects 'unprecedented' debt levels by 2049 | Democrats struggle with Trump tax law provision DOJ files federal lawsuit against Omarosa, alleging she violated ethics law White House hires director of African American outreach after post was vacant for months: report MORE’s book, saying it’s “filled with shocking details that you already knew.”

Colbert on Monday showed a clip of Manigault Newman saying on NBC’s “Meet The Press,” that she heard a tape of Trump using the n-word during a taping of “The Apprentice,” and that it “confirmed that he is truly a racist.”

“This is huge,” Colbert joked, sarcastically adding, “We didn’t know.”

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“Finally, we have proof that the guy who refused to rent to black tenants, said that a Nazi Klan rally had ‘some fine people’ and called Africa a shithole, is a racist,” he continued.

“Rewrite the history books, we didn’t know!” Colbert added.

Manigault Newman alleged in her book that a tape of Trump using the racial slur existed and has claimed in media appearances since that she has heard the tape herself.

The former White House aide has also revealed that she made secret recordings during her time at the White House. She released audio early Tuesday that appeared to show Trump administration staffers admitting that Trump used the n-word.

The White House and Trump have both denied the claims. White House press secretary Sarah Huckabee Sanders has called Manigault Newman a “disgruntled former White House employee” who is “trying to profit off of these false attacks.”

Trump tweeted Monday night that he has never used the racial slur, and that “The Apprentice” creator Mark Burnett called the president to say the tapes don’t exist.

The president continued lashing out at Manigault Newman Tuesday, calling her a “crazed, crying lowlife” and a “dog” in an early morning tweet.