WASHINGTON — The primary time defenders of Donald J. Trump got here for Consultant Liz Cheney, for the offense of getting voted to impeach him, fellow Republicans closed ranks to save lots of her management publish, with Consultant Kevin McCarthy boasting that their “large tent” celebration had sufficient room for each the previous president and a stalwart critic.

Evidently, not anymore.

Simply three months after she beat back a no-confidence vote by lopsided margins, Ms. Cheney of Wyoming, the No. 3 Home Republican, is going through a much more potent problem that seems more and more more likely to finish in her ouster from management. This time, Mr. McCarthy, the minority chief, is encouraging the hassle to switch her.

Her transgression, colleagues say: Ms. Cheney’s continued public criticism of Mr. Trump, her denunciation of his lies a few stolen election and her calls for that the G.O.P. inform the reality about how his supporters assaulted democracy throughout the Jan. 6 riot on the Capitol.

The turnabout displays anew the fervour with which Republicans have embraced Mr. Trump and the voters who revere him, and the way prepared many within the celebration are to perpetuate — or a minimum of tolerate — falsehoods concerning the 2020 election that he has continued to unfold.

What started as a battle over the celebration’s future after the violent finish to the Trump presidency has collapsed right into a one-sided pile-on by Crew Trump, with critics like Ms. Cheney, the scion of a storied Republican household and the lone girl in her celebration’s Home management, ostracized or shifting towards the exits.

The most recent check for Ms. Cheney may come as quickly as subsequent week, when a rising group of Republicans is planning a recent bid to dethrone her, with Mr. McCarthy’s blessing. A lot of her colleagues at the moment are so assured that it’ll succeed that they’re overtly discussing who will substitute Ms. Cheney.

The tensions escalated on Tuesday, when Mr. McCarthy went on Mr. Trump’s favourite information program, “Fox & Mates,” to query whether or not Ms. Cheney may successfully perform her function because the celebration’s prime messenger. (Beforehand, he advised a Fox reporter, “I’ve had it along with her,” and “I’ve misplaced confidence,” in accordance with a leaked recording of the change published by Axios.)

“I’ve heard from members involved about her capacity to hold out the job as convention chair, to hold out the message,” Mr. McCarthy mentioned throughout the portion of the interview that aired. “All of us must be working as one, if we’re in a position to win the bulk.”

With onetime allies closing in, Ms. Cheney, identified for her steely temperament, has solely dug in tougher. Minutes after Mr. McCarthy’s TV hit, she despatched her barbed reply by way of a spokesman, successfully suggesting that the minority chief and Republicans shifting towards her had been complicit in Mr. Trump’s dissembling.

“That is about whether or not the Republican Celebration goes to perpetuate lies concerning the 2020 election and try to whitewash what occurred on Jan. 6,” mentioned Jeremy Adler, the spokesman. “Liz won’t try this. That’s the challenge.”

One of many few Republican voices prepared to rise to Ms. Cheney’s protection was Senator Mitt Romney of Utah, who has himself come underneath assault from his celebration for his unrepentant criticism of Mr. Trump — even getting booed on the Utah Republican Celebration conference on Saturday.

“Each individual of conscience attracts a line past which they won’t go: Liz Cheney refuses to lie,” Mr. Romney wrote on Twitter. “As certainly one of my Republican Senate colleagues mentioned to me following my impeachment vote: ‘I wouldn’t need to be a member of a bunch that punished somebody for following their conscience.’”

Many Home Republicans insist they haven’t any drawback with Ms. Cheney’s vote to question Mr. Trump, which she described as a vote of conscience. Nor, they are saying, are they bothered by her neoconservative coverage positions, which skew — like these of her father, former Vice President Dick Cheney — towards a hawkishness that’s at odds with the “America First” slant of the celebration that Mr. Trump cemented.

However they worry that Ms. Cheney’s refusal to cease criticizing Mr. Trump or condemning the occasions of Jan. 6 may weaken the celebration’s message going into the 2022 midterm elections, once they hope to painting Democrats as big-government socialists so villainous they need to be voted out of the bulk. It has additionally infuriated Mr. Trump.

Many, together with Mr. McCarthy, had hoped that after surviving the February vote of no confidence, Ms. Cheney, as an elected chief, would make like the remainder of the celebration and easily transfer on.

As an alternative, she has doubled down and at instances turned her hearth on colleagues. The ultimate straw for a lot of got here final week in Orlando, the place Republicans gathered for his or her annual coverage retreat in hopes of placing on a present of unity.

Ms. Cheney advised Punchbowl Information that she would marketing campaign in Wyoming — the place she faces a major problem — defending her impeachment vote “day by day of the week.” She advised reporters that any lawmaker who led the bid to invalidate President Biden’s electoral victory in Congress ought to be disqualified from operating for president. And she or he broke with main Republicans when she mentioned a proposed impartial fee to research the Jan. 6 riot ought to deal with the assault on the Capitol by a pro-Trump mob, somewhat than scrutinizing violence by antifa and Black Lives Matter, as Mr. McCarthy and different Republicans have demanded.

A number of days later, she drew assaults from the precise for fist-bumping Mr. Biden at his speech earlier than a joint session of Congress, and took to Twitter to defend herself for greeting the president “in a civil, respectful & dignified manner.”

“We’re not sworn enemies,” she wrote. “We’re People.”

On Monday, after Mr. Trump issued a press release calling the 2020 election “fraudulent” and “THE BIG LIE,” Ms. Cheney shortly tweeted her rebuttal, writing that anybody who made such claims was “poisoning our democratic system.”

Some Republicans privately likened her efficiency to choosing at a scab, and plenty of of Mr. Trump’s allies noticed it as a gap to strive once more to depose her.

“Liz has tried (is FAILING badly) to divide our celebration,” Consultant Lance Gooden, Republican of Texas, wrote on Twitter on Tuesday, emulating Mr. Trump’s caustic Twitter model. “Trump continues to be the LEADER of the GOP, Liz! I stay up for her being eliminated SOON!”

Ms. Cheney’s troubles chart a fast shift for the Republican Celebration within the few months since Mr. Trump left Washington. Early on, she was a part of a small however influential group of Republicans that included Senator Mitch McConnell of Kentucky, the minority chief, and condemned Mr. Trump’s function in stoking the riot with false claims of a stolen election. However a lot of these lawmakers have since gone quiet, leaving Ms. Cheney, who as soon as was enthusiastically spoken of as a future speaker or president, remoted.

Ms. Cheney declined by way of a spokesman to remark, and a number of other of her allies within the Home wouldn’t converse on the file in her protection, underscoring the fraught nature of the vote and the pessimism a few of them really feel about her probabilities of surviving one other problem. A spokeswoman for Consultant Adam Kinzinger of Illinois, one other Republican who voted to question Mr. Trump and has been a number one critic of the previous president, mentioned in a press release that the congressman “unequivocally helps Liz Cheney for convention chair.”

Those that know her finest say privately that Ms. Cheney’s predicament displays each her rules and her character, together with a cussed streak that generally prompts her to behave towards her self-interest. One ally who has been exasperated by her in latest months described her actions as basic Liz Cheney: She’s going to all the time do what she thinks is true, the Republican mentioned on Tuesday, however she’s going to simply by no means cease to suppose she’s fallacious.

With Ms. Cheney hemorrhaging help, Republicans have already begun biking by way of names of potential replacements for a publish historically seen as a steppingstone to the highest celebration positions. Conscious of the optics of changing the one girl in management with one other man, Republicans are eyeing selecting a girl.

The main contender seems to be Consultant Elise Stefanik of New York, a rising star in her fourth term who has lengthy toiled to extend the variety of ladies within the Republican ranks and has extra not too long ago turn into a fierce defender of Mr. Trump.

Ms. Stefanik, 36, has begun reaching out to Republican lawmakers to gauge their help, in accordance with two individuals accustomed to the personal conversations, and by Tuesday night, certainly one of her political aides was retweeting hypothesis that she would “make an impressive convention chair.”

Consultant Man Reschenthaler of Pennsylvania, a member of the Republican management who initially whipped votes for Ms. Cheney, mentioned that he was counting potential votes for Ms. Stefanik and believed the job can be hers if she ran.

Republicans have additionally floated Consultant Jackie Walorski of Indiana as a potential different. As the highest Republican on the Ethics Committee, Ms. Walorski this yr efficiently balanced the job of condemning Consultant Marjorie Taylor Greene’s previous conspiratorial statements whereas arguing she shouldn’t be kicked off her committees.