“We have to take a take a cold, hard look at ourselves and recognize that this is a real problem for our party,” Ms. Mace said in an interview. “We reap what we sow. We saw and heard the violent rhetoric at the rally and look what ended up happening.”

On a call among Republican House members on Monday, Representative Lauren Boebert of Colorado, a hard-right freshman, suggested that some U.S. Capitol Police officers were participants in the riot. Ms. Mace shot back that she was disappointed the party was being led by conspiracy theorists, a swipe at approving comments Ms. Boebert and others in the conference previously made about QAnon…

In an interview, Mr. Meijer recalled a conversation he had with a Republican colleague who believed voting to certify the election was the right thing to do, but feared that making such a move would endanger family members’ safety. Mr. Meijer described watching the lawmaker glued to one spot on the House floor for minutes, voting card in hand, contemplating what to do. The lawmaker eventually voted to overturn the election.

“It just broke my heart,” Mr. Meijer said.