Democratic presidential candidate Bernie Sanders reportedly blasted MSNBC executives prior to the Las Vegas debate, asserting that their coverage of his campaign has not been fair.

Sanders, according to a report from Page Six, marched right up to a top producer, jabbed his finger in their face, and said that he did not expect them to ask him fair questions.

“Surging Sanders stormed through the walk-through for the Las Vegas debate, singling out one top producer at the end and aggressively sticking his finger in his face. One shocked witness said, ‘Bernie marched right up to NBC and MSNBC’s head of creative production and began jabbing his finger right in his face, yelling, ‘Your coverage of my campaign is not fair . . . Your questions tonight are not going to be fair to me.,'” Page Six reports.

A witness of the confrontation said that the NBC exec told Sanders he would be treated fairly.

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“A separate insider confirmed the confrontation, saying Sanders was so steamed he also sparred with MSNBC boss Phil Griffin outside the green room moments before the debate began. Sen. Sanders stated, ‘Phil, your network has not been playing a fair role in this campaign. I am upset. Is anything going to change? . . . I hope you will do better.,'” the report continues.

Sanders’ campaign manager Faiz Shakir told Page Six that Fox News has been “more fair than MSNBC . . . which . . . is constantly undermining the Bernie Sanders campaign.” He added, “MSNBC has not been fair to our campaign. Their coverage is condescending on a daily basis. No other campaign gets such negative coverage. Enough is enough.”