Tucker Carlson, the host of “Tucker Carlson Tonight,” shown in 2017, has consistently drawn headlines for controversial coverage. Richard Drew/Associated Press

NEW YORK — Fox News said Monday that it is parting ways with prime-time host Tucker Carlson, whose stew of grievances and political theories about Russia and the Jan. 6 insurrection had grown to define the network in recent years and influence Republican politics.

Fox said that the network and Carlson had “agreed to part ways” but it did not explain the stunning move, saying that the last broadcast of “Tucker Carlson Tonight” aired last Friday.

Shares of Fox Corp. slid 4% within seconds of the announcement of Carlson’s departure.

The break comes less than a week after Fox agreed to pay $787 million to settle a lawsuit with Dominion Voting Systems over the network’s airing of false claims following the 2020 presidential election. Carlson was also recently named in a lawsuit by a former Fox producer who said the show had a cruel and misogynistic workplace.

Meanwhile, CNN axed its controversial anchor, Don Lemon, as part of a one-day bloodletting in cable television news.

Carlson, who worked at both CNN and MSNBC earlier in his career, ditched his bow-tie look and quickly became Fox’s most popular personality after replacing Bill O’Reilly in the network’s prime-time lineup in 2016.

His populist tone about elites out to get average Americans rang true with Fox’s predominantly conservative audience, even leading to talk about him becoming a political candidate himself one day.

He did not immediately return a message seeking comment on Monday.

“Tucker Carlson had become even bigger than Fox News,” said Brian Stelter, who’s writing an upcoming second book about Fox, “Network of Lies.” “His sudden ouster will have profound consequences for Fox News, for TV news, and the Republican Party.”

When Carlson’s exit was announced during a live showing of the ABC daytime talk show “The View” on Monday, the studio audience applauded. Host Ana Navarro then led the crowd in a sing-along to a line from the song, “Na Na Hey Hey Kiss Him Goodbye.”

Earlier this year, House Speaker Kevin McCarthy gave Carlson exclusive access to security tapes from Jan. 6, 2021, Capitol riot, which the show used to conclude “the footage does not show an insurrection or riot in progress.” His interpretation was denounced by many, including Senate Minority Leader Mitch McConnell.

Carlson has also been outspoken in questioning the United States’ support of Ukraine following its invasion by Russian forces.

“It might be worth asking yourself since it is getting pretty serious: What is this really about?” Carlson said on his show. “Why do I hate Putin so much? Has Putin ever called me a racist? Has he threatened to get me fired for disagreeing with him? Has he shipped every middle-class job in my town to Russia?”

Carlson had been expected to be among the first witnesses called if Dominion’s case had gone to trial, but the two parties settled last Tuesday on the same day that opening statements were expected.

Dominion had contended that some Fox programs had falsely aired allegations that the company had rigged the election against President Donald Trump, even though several Fox executives and personalities didn’t believe them. Carlson’s show was not among them; emails and text messages revealed as part of the lawsuit showed him profanely ridiculing one of the accusers.

In several messages, though, Carlson spoke candidly about his distaste for Trump at the time and his fear that the network was losing viewers among the former president’s fans.

Carlson was recently named in a lawsuit filed by Abby Grossberg, a Fox News producer fired after claiming that Fox lawyers had pressured her to give misleading testimony in the Dominion lawsuit. Grossberg had gone to work for Carlson after leaving Maria Bartiromo’s Fox show.

Her lawsuit says that Grossberg learned “she had merely traded in one overtly misogynistic work environment for an even crueler one – this time, one where unprofessionalism reigned supreme, and the staff’s distaste and disdain for women infiltrated almost every workday decision.”

On her first day of work at Carlson’s program, Grossberg said in her lawsuit, she was met with large, blown-up photographs of Nancy Pelosi in a bathing suit with a plunging neckline.

Fox has countered with its lawsuit, trying to bar Grossberg from disclosing confidential discussions with Fox attorneys and saying in a statement that “her allegations in connection with the Dominion case are baseless.”

“Fox News Tonight” will air in Carlson’s 8 p.m. ET prime-time slot, hosted by a rotating array of network personalities, for the time being.

“We thank him for his service to the network as a host and before that as a contributor,” the press release from the network said.

Associated Press correspondent Ali Swenson and researcher Rhonda Shafner in New York contributed to this report.