WASHINGTON >> House Speaker Nancy Pelosi today named Republican Rep. Liz Cheney to a new select committee on the violent Jan. 6 insurrection at the Capitol, elevating the most unyielding GOP critic of former President Donald Trump to work alongside seven Democrats on the high-profile investigation.

Rep. Bennie Thompson, chairman of the House Homeland Security Committee, will lead the panel, which will investigate what went wrong around the Capitol when hundreds of Trump supporters broke into the building. The rioters brutally beat police, hunted for lawmakers and interrupted the congressional certification of Democrat Joe Biden’s election victory over Trump.

Cheney said in a statement that she is “honored” to serve on the committee and that “Congress is obligated to conduct a full investigation of the most serious attack on our Capitol since 1814.”

Her appointment came just hours after House Republican Leader Kevin McCarthy threatened to strip Republicans of committee assignments if they accepted an appointment from Pelosi to the panel. McCarthy told a closed-door meeting of first-term House GOP members on Wednesday that he, not Pelosi, controls Republicans’ committee assignments, according to a top GOP aide. The aide spoke on condition of anonymity to describe the private meeting.

After the announcement, McCarthy demurred, saying at a news conference that “I’m not making any threats” about committee. But he made clear he wasn’t happy with Cheney.

“I was shocked that she would accept something from Speaker Pelosi,” McCarthy said. “It would seem to me, since I didn’t hear from her, maybe she’s closer to her than us.”

The Wyoming Republican’s appointment to the panel, and the warning from McCarthy, underscores the sharp and growing differences between the two parties over the insurrection. Many Republicans remain loyal to Trump and are loath to spend time reviewing the attack by his supporters. GOP leaders are working to shape the narrative about the committee’s work, complaining that it will be dominated by Democrats even though the Republicans scuttled an earlier attempt to form a bipartisan commission.

The House voted to form the 13-member panel Wednesday over the objections of 190 Republicans. Cheney, who was ousted from GOP leadership this year over her criticism of Trump, was one of only two Republicans who supported forming the committee. Illinois Rep. Adam Kinzinger was the other.

It is unclear when the other five members of the panel will be appointed. The resolution specifies that they will be named after Pelosi consults with McCarthy, and GOP leaders have not said whether Republicans will even participate.

Pelosi announced she would form the committee after Senate Republicans blocked an independent, bipartisan probe. Almost three dozen House Republicans and seven Senate Republicans supported creating such a commission, which would be modeled after a similar panel that investigated the 9/11 attacks. But that was not enough to pass it in the Senate, where at least 10 Republican votes are needed.

Besides Thompson, D-Miss., the other Democratic members of the panel will be Reps. Jamie Raskin of Maryland, Adam Schiff of California, Zoe Lofgren of California, Elaine Luria of Virginia, Stephanie Murphy of Florida and Pete Aguilar of Texas. Raskin led the House prosecution in Trump’s second impeachment trial, which came in the weeks after the insurrection. The former president was eventually acquitted by the Senate.

Thompson was staying in town as the committee sets up office space and hires staff, saying the investigations could unfold in public hearings or closed-door interviews. He did not rule out issuing subpoenas for testimony, if necessary.

Asked when the work would begin, he quipped, “about 30 minutes ago.”

It’s unclear whether the panel would call McCarthy to testify, or others who are publicly known to have spoken with Trump during the run-up to the siege and as the attack unfolded. He seemed to indicate Trump himself would not be called to testify.

“I think there’s a lot other thing that we have to do,” Thompson told reporters.

He said, “I take the work of the committee to seriously and look forward to making sure that the American people and people around the world know exactly what happened.”

As one of only 10 Republicans who voted for that impeachment, Cheney has separated herself from most of her GOP colleagues in recent months by directly blaming former president for the insurrection.

The only member of her party’s leadership to back impeachment, she accused Trump of betraying the Constitution by fomenting the attack, saying he “summoned this mob, assembled the mob, and lit the flame of this attack.”

The impeachment resolution blamed Trump for the siege because of his falsehoods about the election and for his words to supporters ahead of the insurrection, including telling them to “fight like hell” to overturn his defeat to Biden.

The gap between Cheney, the daughter of former Vice President Dick Cheney, and many of her Republican colleagues has grown only wider and more bitter in recent weeks. She withstood a February effort by conservatives to remove her from her No. 3 post, but was finally dumped in May in a voice vote of GOP lawmakers that underscored Trump’s hold on the party.

Though she’s had a lower profile since leaving her leadership post and her political future is unclear, Cheney has remained in Congress and continued speaking out against the former president.

McCarthy, meanwhile, is facing pressure to take the investigation seriously from the police officers who responded to the attack — dozens of whom suffered injuries that day as Trump’s supporters fought past them and broke into the building. Several officers sat in the gallery and watched Wednesday’s vote, and several expressed surprise afterward that so many Republicans opposed it.

One of the officers, Michael Fanone of Washington’s Metropolitan Police, said he was angry at Republicans for voting against an investigation after he almost lost his life to protect them.

“I try not to take these things personally, but it’s very personal for me,” Fanone said.