At the peak of Speaker Kevin McCarthy’s quest for his submit in January, Representative Chip Roy, Republican of Texas, darted from assembly to assembly guaranteeing that hard-line conservatives acquired what they needed earlier than agreeing to again the California Republican.

One by one, practically all of their calls for have been met in what Mr. Roy would later name a “power-sharing” settlement between Mr. McCarthy and his proper flank. The laborious proper received three seats on the influential House Rules Committee (one went to Mr. Roy); a dedication from Mr. McCarthy that Republicans would by no means increase the debt ceiling with out deep spending cuts; and a rule permitting anybody lawmaker to drive a vote to oust the speaker ought to he fail to maintain his guarantees.

Now, Mr. Roy, 50, the coverage chairman of the ultraconservative House Freedom Caucus who has emerged because the laborious proper’s spending knowledgeable, is accusing Mr. McCarthy of getting reneged on the deal, and is making an attempt to exert his leverage once more — this time with probably dire penalties. He and his allies are trying to shoot down the settlement Mr. McCarthy reached with President Biden to droop the debt ceiling simply days earlier than the nation is headed for default.

If not, he stated, the House Freedom Caucus may as soon as once more need to go toe-to-toe with Mr. McCarthy. Several members have floated the thought of calling for Mr. McCarthy’s removing.

“If we can’t kill it, we’re going to have to regroup and figure out the whole leadership arrangement again,” Mr. Roy stated Tuesday on Glenn Beck’s radio present.

That’s a far cry from the place Mr. Roy discovered himself in solely weeks in the past, when he labored alongside House G.O.P. leaders to make sure passage of a much more conservative debt-limit invoice, which might have lifted the borrowing restrict solely in alternate for substantial spending cuts. Representative Garret Graves, Republican of Louisiana and an ally of Mr. McCarthy’s, stated he gained respect for Mr. Roy working tightly with him on that bundle.

“I didn’t have an incredibly high opinion of Representative Chip Roy going into it. He’s one of my best friends now,” Mr. Graves said.

Now, Mr. Roy, who’s a mixture of legislative wonk and speechifying firebrand, has been circulating paperwork breaking down all of the other ways he believes Mr. McCarthy’s 99-page debt restrict deal is, in his phrases, a “betrayal” of conservatives. In an easy-to-digest format, they lay out — step-by-step — how the settlement Mr. McCarthy reached with Mr. Biden falls in need of conservative calls for to rein in spending, streamline power venture allowing and impose stringent work necessities for social security internet advantages.

He and his allies view the nation’s $31.5 trillion nationwide debt as a better menace to America than the Treasury Department’s warning that the nation may default on sure payments by June 5.

“Not one Republican should vote for this deal,” Mr. Roy stated at a Freedom Caucus news convention on Tuesday, a number of hours earlier than he broke along with his occasion to attempt to block the measure from the ground in a vote within the House Rules Committee. The effort failed; just one different Republican joined him in opposing a measure to advance the deal to a flooring vote on Wednesday.

Still, the “no” votes towards the laws are starting to pile up. By Tuesday afternoon, greater than 30 House Republicans had gone on report towards it.

“Bill’s horrible for America,” stated Representative Clay Higgins, Republican of Louisiana.

Mr. McCarthy and his management crew have been working laborious to shore up help, distributing their very own charts and graphs touting diminished spending. The invoice appeared on observe to move on Wednesday, with a considerable variety of Democratic votes to compensate for G.O.P. defections.

But Mr. Roy’s charts are fueling the arguments of different conservatives as they combat the laws. He distributed a four-page memo final month of speaking factors for different Republicans because the negotiations went on. Then he posted two charts emphasizing what he known as the failings of the deal.

Mr. Roy “provides the most concise summary I’ve seen regarding the problems with the debt-ceiling deal,” Senator Mike Lee, Republican of Utah, who has pledged to delay a Senate vote on the invoice, wrote on Twitter.

Born in Bethesda, Md., Mr. Roy grew up within the Washington space. His father labored for the I.R.S., and he earned his undergraduate and masters levels from the University of Virginia (the soccer gamers Tiki and Ronde Barber, whom he befriended there, attended his marriage ceremony). But he discovered hardball politics in Texas after receiving his regulation diploma from the University of Texas. He served as Senator Ted Cruz’s chief of employees and in some ways mirrors his former boss’s pugnacious and verbose fashion.

But not like many within the Freedom Caucus, he’s no acolyte of former President Donald J. Trump. He voted to certify Mr. Biden’s victory and has endorsed Governor Ron DeSantis of Florida for president.

Mr. Roy likes to invoke a scene from the film “Braveheart” when describing what conservatives’ method ought to be to the debt restrict. It’s the one the place Scottish freedom fighters have shaped a decent line and their chief, William Wallace, repeatedly orders, “Hold!” earlier than they launch a unified spear assault towards the British.

“My position is: Hold the damn line,” he says.

Mr. Roy has claimed that one among Mr. McCarthy’s concessions to the laborious proper was a pledge that nothing would move out of the Rules Committee with out the help of all 9 Republicans on the panel. On Tuesday, Republicans break up over the debt ceiling bundle, which superior to the ground by a vote of seven to six, with Mr. Roy and Representative Ralph Norman, Republican of South Carolina, becoming a member of Democrats in voting towards the measure.

Mr. Roy has repeatedly stated he feels betrayed by Mr. McCarthy.

“I think this is going to be a problem for him,” Representative Ken Buck, Republican of Colorado, stated of Mr. McCarthy’s push to move the debt ceiling deal. “They’re hemorrhaging.”

He stated he believed a transfer to oust Mr. McCarthy could possibly be within the works if the speaker advances the invoice with out a majority of Republicans. Mr. Buck stated he may see the variety of Republicans opposing the invoice rising to greater than 100 as lawmakers discovered extra about its contents.

Democrats see Mr. Roy’s techniques as placing the nation in danger.

“This represents an all-time high in recklessness and stupidity,” Representative Jim McGovern, Democrat of Massachusetts, stated of Republican efforts to make use of the debt ceiling as leverage. He added: “Democrats have had to be the adults in the room.”