With Time Running Short, Liz Cheney Implores Republicans to Reject Trump

In a flurry of appearances and commentary, former Representative Liz Cheney has stepped up her denunciations of former President Donald J. Trump in a last-ditch effort to persuade Republicans not to nominate him again.

“Tell the world who we are with your vote. Tell them that we are a good and a great nation,” Ms. Cheney told primary voters in New Hampshire on Friday, in a speech at Dartmouth College’s Democracy Summit. “Show the world that we will defeat the plague of cowardice sweeping through the Republican Party.”

A day later, she blasted Mr. Trump’s suggestion on the campaign trail that the Civil War could have been prevented if President Abraham Lincoln had “negotiated.”

“Which part of the Civil War ‘could have been negotiated’? The slavery part? The secession part? Whether Lincoln should have preserved the Union?” she wrote on X. “Question for members of the G.O.P. — the party of Lincoln — who have endorsed Donald Trump: How can you possibly defend this?”

And in an interview on Sunday on “Face the Nation” on CBS News, she denounced Mr. Trump’s attempts to end or delay his criminal trials by arguing that he had immunity against charges related to anything he did in office. She endorsed efforts to remove him from ballots under Section 3 of the 14th Amendment.

“I certainly believe that Donald Trump’s behavior rose to that level,” she said, referring to Section 3’s disqualification of people who engaged in insurrection against the Constitution after taking an oath to support it. (She made a similar comment at Dartmouth, saying, “There’s no question in my mind that his actions clearly constituted an offense that is within the language of the 14th Amendment.”)

“I think that there’s no basis for an assertion that the president