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Keith Olbermann apologized Tuesday for calling President Donald Trump "a whiny little Kunta Kinte."

The former MSNBC host made the remark during a Twitter rant, referencing the fictional slave from the 1976 novel Roots.

"Yes @realDonaldTrump has always been, will always be, and on the day of his bid for re-election, still is: a whiny little Kunta Kinte," Olbermann tweeted.

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Olbermann was reacting to Trump's interview on "Fox & Friends" Tuesday morning.

According to Dictionary.com, Kunta Kinte is a derogatory name for an African refugee.

Olbermann -- who clearly didn't know who Kunta Kinte was -- apologized in a follow-up tweet.

"Just logged back in: I apologize for my previous subtweet of this. I was using an old 70's-80's technique for calling somebody a c**t without writing/saying c**t, just using a sound-alike to call Trump a c**t Deleting previous, largely because this one clarifies the c**t part," Olbermann wrote."

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His "apology" prompted a response from actor LeVar Burton who played Kunta Kinte in the Roots TV mini-series.

But the fierce backlash from Black & white Twitter continued.

Journalist Tim Pool tweeted, "Keith Olbermann is a racist."