“This is about being able to tell your kids that you stood up and did the right thing"

“We’ve got people we’ve entrusted with the perpetuation of the Republic who don’t know what the rule of law is,” she said. “We probably need to do Constitution boot camps for newly sworn-in members of Congress. Clearly.”

She said her main pursuit now involved teaching basic civics to voters who had been misinformed by Mr. Trump and other Republicans who should know better. “I’m not naïve about the education that has to go on here,” Ms. Cheney said. “This is dangerous. It’s not complicated. I think Trump has a plan.”

Ms. Cheney’s own plan has been the object of considerable speculation. Although she was re-elected in 2020 by 44 percentage points, she faces a potentially treacherous path in 2022. Several Wyoming Republicans have already announced plans to mount primary challenges against Ms. Cheney, and her race is certain to be among the most closely followed in the country next year. It will also provide a visible platform for her campaign to ensure Mr. Trump “never again gets near the Oval Office” — an enterprise that could plausibly include a long-shot primary bid against him in 2024.

Friends say that at a certain point, events — namely Jan. 6 — came to transcend any parochial political concerns for Ms. Cheney. “Maybe I’m being Pollyanna a little bit here, but I do think Liz is playing the long game,” said Matt Micheli, a Cheyenne lawyer and former chairman of the Wyoming Republican Party. Ms. Cheney has confirmed as much.