GOP presidential front-runner Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE is accusing CNBC, the host of Thursday night’s third Republican debate, of being “very unfair.”

The billionaire tweeted on Wednesday that he is “looking forward to what I am sure will be a very unfair debate!”

After a great evening and packed auditorium in Iowa, I am now in Colorado looking forward to what I am sure will be a very unfair debate! — Donald J. Trump (@realDonaldTrump) October 28, 2015

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Trump and several other GOP candidates threatened to boycott the debate earlier this month if the network did not change its format. Those candidates were annoyed that the debate did not include opening or closing statements and did not have a time limit.

CNBC caved in to the demands and agreed to alter the format of the debate.

The top 10 GOP primary candidates will square off on the campus of the University of Colorado in the main debate at 8:00 p.m.

The undercard debate, featuring four additional candidates, begins at 6:00 p.m.