"If anybody's scared of this investigation I ask you one question, what are you afraid of?" the GOP lawmaker said.
Representative Lauren Boebert said Liz Cheney and Adam Kinzinger "have done more to hurt" Republicans than help.
Trump is trying to get Republicans to rally around one candidate in an effort to streamline votes against Liz Cheney.
"We must know what happened here at the Capitol. We must also know what happened every minute of that day in the White House," Liz Cheney said at the hearing.
The Congressman also defended being a Republican on the committee. "This cannot continue to be a partisan fight," he said.
"People need to know the truth. Will we be so blinded by partisanship that we throw away the miracle of America?" the Republican congresswoman said.
Republican House leaders are arguing that the bipartisan committee should focus more on whether Speaker Nancy Pelosi should have done more to secure the Capitol.
Law enforcement officers who testified at the hearing described rioters beating them with "any items they could get their hands on," such as flagpoles, tasers and rocks.
When asked if Liz Cheney and Adam Kinzinger would be punished for serving on the January 6 Capitol Riot committee, McCarthy replied, "We'll see."
She said Sunday that Kinzinger "brings great patriotism to the Committee's mission: to find the facts and protect our Democracy."
Former Republican staffer John Pitney said Pelosi and Cheney have "a legitimate shared interest in getting to the bottom of the insurrection."
"There's no way to just overlook this and say it didn't happen," Maryland's Republican governor said.
"At every opportunity, the minority leader has attempted to prevent the American people from understanding what happened—to block this investigation," Cheney said.
The Georgia lawmaker reacted to Cheney's criticism of House Minority Leader Kevin McCarthy after he withdrew his January 6 committee appointees
"At every opportunity, the Minority Leader has attempted to prevent the American people from understanding what happened," Rep. Cheney said.
McCarthy has reversed his earlier stance of boycotting the probe to suggest partisanship, but he will now add Republicans to the panel and take part.
Six months after the Capitol riot, the 10 Republican representatives who voted to impeach Donald Trump are fighting for their political lives. Says one pundit: "I'd be surprised if more than three of the 10 are still in Congress in 2023."
The House Minority Leader warned other Republican members against accepting the assignment from Pelosi if she names them to the January 6 committee.
The Wyoming Republican has been an outspoken critic of Trump and fellow GOP lawmakers supporting the former president following the events of January 6.
Gonzalez and Cheney were among the 10 House Republicans who voted in favor of impeaching Trump following the deadly January 6 riot at the U.S. Capitol.
"They took it hook line and sinker and ran with it," K.W. Miller reportedly said of his expressing support for QAnon in the past. "We just flushed them out."
The former president touted the New York Republican for being "incredible and loyal" during the fundraiser at his New Jersey golf course.
"Matt and I have teamed up because we refuse to allow Liz Cheney or Adam Kinzinger or any Trump-hating Republican ... we won't allow the GOP to turn into their party," Greene said.
"I will never understand the resistance, for example, to voter ID," Cheney said.
"The American people deserve the truth," the Illinois Republican said.
"We need to be on the side of truth, we need to be on the side of substance," the Ohio congressman said.
Bouchard said he went public to get ahead of the story after he learned people were investigating the relationship as part of the opposition to his candidacy.
The Republican Party is emerging from its cocoon of populist rhetoric a changed animal—just not one that anyone needs or wants.
The percentages demonstrate the potential uphill climb that Cheney could face during her campaign for re-election in 2022.