When Joe Kent ran for Congress final 12 months, he was a political neophyte difficult a six-term incumbent congresswoman for the Republican nomination. But he additionally had some of the precious boosters in Republican politics: the now-former Fox News host Tucker Carlson.

Mr. Carlson made Mr. Kent a daily on his prime-time present, which in flip helped make Mr. Kent’s marketing campaign.

“I was up against a Republican who was backed by the full weight of the Republican establishment,” mentioned Mr. Kent, who misplaced within the common election. “Being able to get on Tucker for free and have him say, ‘I hope you win, I agree with what you’re saying,’ was really important.”

Mr. Kent’s expertise displays what made Mr. Carlson a singular determine in Fox News’s steady of anchors till the community abruptly took “Tucker Carlson Tonight” and its host off its channel final month. Supporters and detractors alike say Mr. Carlson’s political energy was rooted in his potential to position folks and concepts from the vanguard of right-wing politics in entrance of the biggest standard conservative viewers in media.

“He really provided a populist nationalist platform in legacy national media in prime time,” mentioned Stephen Okay. Bannon, a former Trump adviser and editor in chief of Breitbart, a right-wing web site. “He’s the only one.”

Whether he can play an analogous function as a conduit between the far proper and the mainstream with out Fox is maybe the most important query raised by Mr. Carlson’s hints about his subsequent transfer.

Last week, he mentioned he could be beginning a brand new present on Twitter, apparently strolling away from a $25 million Fox contract to take action. But the particulars of his plans — the platform’s mercurial proprietor, Elon Musk, tweeted final week that “we have not signed a deal of any kind whatsoever” with Mr. Carlson — stay largely obscure, and Mr. Carlson didn’t reply to a request for remark.

Fox, which is in negotiations with Mr. Carlson over his departure and will search to dam his transfer to a different platform, has not commented.

“No matter what, it’s a paradigm shift,” mentioned Jason Damata, the chief government of Fabric Media, a media and promoting consultancy.

The actual scale of the shift will depend upon whether or not Mr. Carlson can break from the precedent set by earlier Fox stars. The anchors of Fox’s prime-time block have lengthy been among the many largest-looming figures in conservative media. But their departures have had little affect on the habits of the networks’ viewers. Past stars like Glenn Beck, Megyn Kelly and Bill O’Reilly have usually moved on to profitable however lower-profile subsequent acts.

Mr. Beck, arguably Mr. Carlson’s closest analogue amongst his predecessors, attained monumental affect within the Tea Party motion after leaping from CNN Headline News to Fox News in 2008. After parting methods with the community in 2011, he started his personal subscription-based streaming community, successfully buying and selling a Fox-size viewers for tens of millions more in annual revenues from a relatively small viewership of loyal followers and principally receding from political prominence.

Mr. Carlson’s affect, like Mr. Beck’s, has been intently tied to the actual nature of the Fox platform.

“Fox is on cable, it’s a channel they set to by default on a lot of military bases, doctor’s offices, gyms — that’s where Tucker picked up so many viewers,” mentioned Nandini Jammi, the co-founder of Check My Ads, a model security consultancy, and beforehand the co-founder of Sleeping Giants, a corporation that led campaigns pressuring firms to drag promoting from Fox News.

“Are those viewers going to go through a conversion process of giving Tucker their email addresses, actively seeking out his content, and sustaining him?” Ms. Jammi continued. “That’s a very difficult business to build.”

Ms. Jammi was skeptical of Mr. Carlson’s potential to take care of the identical footprint on the shakier floor of Twitter, a platform with a consumer base vastly bigger than Mr. Carlson’s Fox viewers however a much more troublesome place to construct a sturdy, dedicated following.

It was entry to the Fox viewers that made Mr. Carlson’s present a coveted reserving for right-wing activists, politicians and social media personalities, together with many with massive social media presences.

“We reach more of a hard-core activist base,” Mr. Bannon mentioned of his “War Room” podcast. “He reached a different audience — if you leave the 75-year-olds aside, a lot of people who are businessmen and entrepreneurs, people who are nominal Republicans but are not hard-core and, I would say, are relatively low-information.”

To his detractors, this made Mr. Carlson a uniquely regarding determine, who acclimated standard Republican audiences to far-right concepts. His exhibits — “Tucker Carlson Tonight” and its long-form sibling, “Tucker Carlson Today,” on the Fox Nation streaming community — performed a major function in mainstreaming the idea of the “great replacement,” a racist, anti-immigrant conspiracy idea distinguished amongst white nationalists.

In a 2021 “Tucker Carlson Today” episode, Mr. Carlson spent greater than an hour interviewing the far-right blogger Curtis Yarvin, who expounded on America’s want for a monarch determine who might break the ability of the nation’s elites and institute a benevolent autocracy.

“I don’t think you’re crazy,” Mr. Carlson instructed Mr. Yarvin. “I think you’re pretty far out in a way that’s worth thinking about.”

And some Republicans bemoaned Mr. Carlson’s elevation of politicians like Mr. Kent. Mr. Carlson introduced Mr. Kent on his on-line present, “Tucker Carlson Today,” for an hourlong interview simply 4 months after he declared his candidacy in opposition to Jaime Herrera Beutler in southwestern Washington State in early 2021.

The two stayed in contact, and Mr. Kent turned a daily on Mr. Carlson’s prime-time present all through the first, wherein he finally secured Donald J. Trump’s endorsement and toppled Ms. Herrera Beutler, certainly one of 10 Republicans to vote to question Mr. Trump after Jan. 6.

In the overall election, nevertheless, Mr. Kent was dogged by experiences of associations with prominent white nationalists and Proud Boys and misplaced a solidly Republican seat.

Mr. Carlson had as soon as included Mr. Kent on a section championing a slate of “surging outsiders” in races throughout the nation. The listing additionally included Blake Masters and Kari Lake in Arizona, Mehmet Oz in Pennsylvania, and J.D. Vance in Ohio.

All of them however Mr. Vance misplaced their races in November.