JACKSON, Wyo. — Rep. Liz Cheney lost her GOP primary in Wyoming Tuesday night, falling to a Donald Trump-endorsed challenger after becoming a vocal Republican dissident against the former president following the Jan. 6 attack on the Capitol.

Cheney, who was seeking a fourth term, was defeated by Harriet Hageman, an attorney and former Cheney supporter who Trump selected last year as his chosen candidate to oppose her. Cheney’s vote to impeach Trump for inciting the Jan. 6 insurrection, her vocal defense of that vote and her leadership role on the House committee investigating the attacks and Trump’s actions made her Trump’s top political target in the midterms.

She made her opposition to Trump, whom she has repeatedly described as a threat to democracy, a core part of her political identity — and it consigned her to double-digit defeat in heavily pro-Trump Wyoming. But Cheney, who conceded to Hageman on Tuesday evening, signaled she wasn’t going away, telling supporters that Tuesday night was just the beginning.

“I have said since Jan. 6 that I will do whatever it takes to ensure that Donald Trump is never again anywhere near the Oval Office, and I mean it,” Cheney said at the close of her speech. “This is a fight for all of us together.”

Hailing from a state that voted for Donald Trump by more than 40 percentage points in 2020, Cheney is an often-lonely face of intra-party resistance against the former president. On Tuesday night, she cast her fight for the soul of her party as an existential one — repeatedly invoking the Civil War and President Abraham Lincoln as a model, while chastising Republican office-seekers who have followed Trump.

Former President Donald Trump endorses Harriet Hageman for Wyoming’s U.S. House seat during a rally on May 28, 2022, at the Ford Wyoming Center, in Casper, Wyo.