Allies of Mr. Trump were infuriated by Ms. Cheney’s decision last month to vote to impeach him. In Wyoming, the state Republican Party censured her, citing the vote, and called on her to resign.
Some Republicans in Congress retaliated by forcing an internal conference vote in a bid to strip her of her leadership position. Ms. Cheney ultimately held onto her leadership post in a lopsided secret-ballot vote, despite refusing to apologize for voting to impeach Mr. Trump.
On Tuesday she redoubled her criticism of Mr. Trump’s role in the Jan. 6 riot, calling his blasé response while lawmakers were under attack an “existential threat to who we are” that “can’t be minimized or trivialized, and it can never happen again.”
Ms. Cheney also assailed the “America First” foreign policy Mr. Trump and his allies in Congress had championed, calling the ideas behind them “just as dangerous today as they were in 1940 when isolationists launched the America First movement to appease Hitler and prevent America from aiding Britain in the fight against the Nazis.”
“Isolationism was wrong and dangerous then and it is wrong and dangerous now,” she said.
She also extended her criticism to media outlets that falsely reported that the presidential election was fraudulent or stolen, accusing them of “contributing to a very dangerous set of circumstances.”