In the hours after Mr. Carlson’s monologue, word of which spread quickly across social media, Mr. Trump’s supporters not only went after Mr. Carlson but also Fox News. The network has become a source of particular frustration with many on the right after taking a more skeptical view of Mr. Trump’s claims about voter fraud and refusing to reconsider its call on election night that Mr. Biden would win Arizona.
That decision, which proved correct, deeply angered the president and led him to start promoting some of Fox’s smaller competitors on cable like Newsmax and One America News Network as more suitable alternatives for his large and loyal following.
Roosh Valizadeh, an alt-right figure with a history of extremist views whose writings have attracted a following, was an example of how the large online community of far-right, pro-Trump commentators started to mobilize against Fox after Mr. Carlson’s comments. “As long as Tucker Carlson works for Fox News, he can’t be fully trusted,” Mr. Valizadeh wrote on Twitter.
All week on networks like Newsmax and OANN and talk radio programs, the president’s supporters have been given a steady diet of interviews with Trump allies, campaign officials and news stories that promote allegations of fraud with little or no context.
One lawyer who is assisting the Trump campaign in its efforts, Lin Wood, went unquestioned this week on Mr. Levin’s show when he made the fantastical claim that Mr. Trump had won the election with 70 percent of the vote. A story that OANN broadcast on Friday afternoon falsely declared, “The state of Michigan is back in play,” giving credence to Mr. Trump’s extraordinary but almost certainly unsuccessful efforts to delay certification of the vote in Detroit.
Republican officials have remained mostly measured and muted in their response, even after the conspiratorial and unsubstantiated claims floated by Ms. Powell, Rudolph W. Giuliani and other members of Mr. Trump’s legal team at a news conference on Thursday. Republicans like Senator Joni Ernst of Iowa, who said that Ms. Powell’s accusations were “absolutely outrageous,” were the exception.
Rich Lowry, the editor of National Review and sometimes critic of the president who called his refusal to concede “absurd and sophomoric,” said that whether it was a Republican politician or a talk-show host, breaking the will that many Trump supporters have to believe he is the rightful winner was extremely difficult.