Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE on Friday accused CNN of being an arm of Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE's presidential campaign.

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The Republican nominee has has a tempestuous relationship with CNN in recent months after appearing regularly on the network during the GOP primary.

In a series of tweets, he criticized the cable news network for writing "fiction" about him. He also laid into the network's chairman, Jeff Zucker.

.@CNN is unwatchable. Their news on me is fiction. They

are a disgrace to the broadcasting industry and an arm of the Clinton campaign. — Donald J. Trump (@realDonaldTrump) September 9, 2016

Jeff Zucker failed @NBC and he is now failing @CNN. — Donald J. Trump (@realDonaldTrump) September 9, 2016

Trump on late Thursday additionally criticized CNN’s handling of a biography it aired about him the same evening.

The documentary of me that @CNN just aired is a total waste of time. I don't even know many of the people who spoke about me. A joke! — Donald J. Trump (@realDonaldTrump) September 9, 2016

Trump has repeatedly accused CNN of bias against him while competing against Clinton for the presidency.

Last month, for example, he called the news network a “press shop” for Clinton and her campaign surrogates.

Zucker said in August he is not troubled by the billionaire’s frequent criticism of CNN’s news coverage.

“It doesn’t bother me at all,” he said in an interview with Vanity Fair published Aug. 2. “If everybody is a little upset at the end of the day, we’re probably doing our job.”

CNN notably hired Corey Lewandowski, Trump’s original campaign manager, as a political commentator after his firing from the businessman’s staff in late June.

CNN first aired “All Business: The Essential Donald Trump” focusing extensively on the real estate tycoon’s background in business and entertainment.

“The story of Donald Trump is truly one of a kind,” Gloria Borger, CNN’s chief political analyst, told The Hill in an exclusive preview of the biopic published last Monday.

“What we tried to do in the Donald Trump documentary is provide a full portrait of the man — from his childhood, through his successes and difficult times, to his prominence as a national celebrity on television, to the current campaign,” she added.

“What’s interesting about this is that since Trump has not been a political figure his entire life, we interview a whole host of people you do not ordinarily see on TV.”

CNN additionally began airing “Unfinished Business: The Essential Hillary Clinton,” a biography of the Democratic nominee, late Monday.