Republican Rep. Harriet Hageman of Wyoming announced her candidacy for the U.S. Senate on Tuesday, aiming to replace retiring Sen. Cynthia Lummis. A staunch Trump ally who defeated Liz Cheney in 2022, Hageman received immediate endorsement from President Donald Trump. The seat in the deeply Republican state is expected to remain in GOP hands.
Wyoming's sole House representative, Harriet Hageman, entered the race for the open U.S. Senate seat on Tuesday, December 23, positioning herself as a successor to Sen. Cynthia Lummis, who announced last Friday that she would not seek reelection. Lummis, 71, cited exhaustion after a demanding session, stating, “I am a devout legislator, but I feel like a sprinter in a marathon. The energy required doesn’t match up.” She expressed continued support for President Trump, vowing to advance legislation in 2026 and help retain Republican Senate control.
Hageman, a two-term congresswoman, highlighted her close ties to Trump in her launch video, which featured her 102-year-old mother, Marion Hageman. “This fight is about making sure the next century sees the advancements of the last, while protecting our culture and our way of life,” she said. “We must dedicate ourselves to ensuring that the next 100 years is the next great American century.” She emphasized her work with Trump on border security, claiming collaboration to secure $46 billion in funding without burdening Wyoming residents, and pledged to maintain the state's leadership in energy and food production.
Trump quickly endorsed Hageman on Truth Social, offering his “complete and total” support and calling her a “TOTAL WINNER!” who “WILL NEVER LET YOU DOWN.” Hageman rose to prominence by ousting Trump critic Liz Cheney in the 2022 Republican primary, winning 66% to Cheney's 29%, with Trump campaigning for her in Casper that May. Trump carried Wyoming with nearly 72% of the vote in 2024, while Hageman won reelection by a wide margin of nearly 48 points.
The seat is rated solidly Republican by the Cook Political Report, with Lummis securing 73% in 2020. Wyoming, with a population under 600,000, has one at-large House district. If elected, Hageman would join Senate Majority Whip John Barrasso, reelected in 2024. Tyler Bowyer, COO of Turning Point Action, praised her on X, saying, “She will be one of the best US Senators in the country. No question. We need her in there!” Earlier this year, however, Hageman faced boos at a town hall over discussions of federal cuts and Social Security.
