Fox News host Tucker Carlson on Monday took aim at rival news network CNN and its president, Jeff Zucker, over CNN's coverage of special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's investigation into the Trump campaign and Russia, which concluded Friday.

During a segment on his show Monday night, Carlson mocked CNN media reporter Brian Stelter, whom he repeatedly referred to as a "eunuch," accusing him of trying to whitewash the network's coverage of the Russia investigation on Zucker's behalf.

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“The ‘greatest value add.’ That's how CNN sums up its role in the Russia story,” Carlson said responding to a clip from Stelter's show, "Reliable Sources."

"Does a single person believe that? Of course not. Not one person. Jeff Zucker himself doesn't believe that," Carlson continued. "And that's why he sent out his marionette to lie, as you just saw. Jeff Zucker is an anxious man tonight: He's been caught doing the one thing journalists are not allowed to do. He intentionally misled his audience."

"In a fair world, Zucker would be running a car wash, or selling timeshares in Cancun. He would not be in the news business. Zucker himself knows that very well. He knows he's an impostor. In a fair world, CNN wouldn't call itself a news network at all," Carlson concluded. "It's far less than that, and it has been for a long time."

Carlson's comments come as his network and CNN have called each other out for months over coverage of the Trump administration, with Zucker labeling Fox News a "propaganda network" in an interview earlier this month.

In discussing the Democratic National Committee's (DNC) decision not to give a debate to Fox News, Zucker said the DNC had "no obligation" to do so.

“I think the consternation about this is a little misplaced,” Zucker said. “They don’t have to give one to CNN, they don’t have to give one to NBC. They have no obligation to give one to Fox.”

“I think the question should be, is Fox state-run TV or is the White House state-run government by Fox TV?” he added at the time.

Conservatives and allies of the president have targeted the media following the conclusion of Mueller's investigation over the weekend, which ended without further indictments for Trump's associates and with a conclusion from the attorney general that Mueller found no evidence of collusion between Trump's campaign and Russia in 2016.