Democrat Eileen Laubacher is projected to defeat incumbent Rep. Lauren Boebert (R-Colo.) in Colorado's 4th Congressional District, according to Decision Desk HQ. The call marks a stunning upset in a district that has long been a Republican stronghold, and it ends the congressional career of one of President Trump's most vocal allies.
With more than 95% of the vote counted as of Friday, Laubacher led with 48.8% to Boebert's 47.8%. Decision Desk HQ had rated the race as “likely Republican” heading into Election Day, underscoring the magnitude of the Democratic victory.
Laubacher, a retired two-star Navy admiral and former Republican, leaned heavily on her military and national security credentials throughout the campaign. She spent 34 years in the Navy, with deployments to Afghanistan and India, and later served on the National Security Council during the Biden administration. Her campaign also benefited from a significant fundraising edge, out-raising Boebert by millions, according to Federal Election Commission filings.
In her victory, Laubacher emphasized affordability, healthcare, and fiscal responsibility, while sharply criticizing Trump's tariffs and the administration's handling of the war with Iran. Her message resonated in a district that, while conservative, had shown signs of restiveness with Boebert's polarizing style.
Boebert, who first won election in 2020 in Colorado's 3rd District, quickly became a prominent figure in the House GOP's conservative wing. But her political standing was shaken in 2022, when she narrowly survived a challenge from Democrat Adam Frisch by just 546 votes. Rather than risk another difficult race, Boebert announced in late 2023 that she would switch to the 4th District, which was being vacated by retiring GOP Rep. Ken Buck.
The move paid off in 2024, when she won the seat by roughly 12 percentage points. But this time, she faced a well-funded and disciplined opponent in Laubacher, who cast herself as a pragmatic problem-solver. Boebert, meanwhile, doubled down on her support for Trump's agenda, particularly on immigration and border security.
The result is a significant blow to House Republicans, who had counted on holding the seat. It also adds to a growing narrative that the 2026 midterms could be a challenging environment for the GOP, with Democrats' 2026 win being seen as a warning rather than a full mandate. Laubacher's victory is likely to be celebrated by national Democrats as evidence that their message on economic and national security issues can break through in conservative-leaning districts.
For Boebert, the loss marks an abrupt end to a six-year tenure that was often marked by controversy. Her district switch had already drawn criticism, and this defeat cements her transition from rising star to former congresswoman. The race also highlights the volatility of Trump-aligned politics in suburban and exurban areas, even in deep-red territory.
Laubacher's win is one of several surprises in the 2026 cycle, as voter ID measures swept even as Democrats won big. The coming weeks will likely see intense analysis of what this means for the GOP's path forward and whether other vulnerable Republicans will face similar challenges.
