Wyoming Republican Primaries: Barlow Wins Governor Nomination, Hageman Wins Senate Nomination

Wyoming held Republican primary elections on Tuesday, August 18, 2026, for both governor and U.S. Senate. State Sen. Eric Barlow won the Republican nomination for governor, and Rep. Harriet Hageman, Wyoming's lone U.S. House member, won the Republican nomination for Senate, as projected by NBC News. In the governor's race, Barlow defeated Megan Degenfelder, who had been endorsed by President Donald Trump, for the seat being vacated by term-limited Gov. Mark Gordon. In the Senate race, Hageman won the nomination to succeed retiring Sen. Cynthia Lummis. Given Wyoming's strong Republican lean, both primary victories are widely regarded as effectively determining the outcomes of the general election for governor and senator. The Republican nominees are expected to face Democratic and other opponents in the general election, though specific general-election matchups, dates, and vote totals were not detailed in available reporting. It remains unresolved whether Trump's endorsement played a significant role in the Senate race, as no report indicated he had endorsed a candidate other than Hageman, in contrast to his endorsement of Degenfelder in the governor's race.