Who Is Eileen Laubacher? Former Republican Navy Admiral Who Defeated Lauren Boebert

Eileen Laubacher, a former Republican and retired two-star Navy rear admiral, defeated three-term Republican Rep. Lauren Boebert in Colorado’s 4th Congressional District. The race on Friday, Nov. 13, 2026, marking a Democratic victory in a district that Donald Trump carried by more than 18 percentage points in the 2024 presidential election.

Laubacher’s win represents a significant shift in Colorado’s congressional representation. The result also leaves Republicans with just one representative in Colorado’s 10-member congressional delegation.

A Military Career Spanning More Than Three Decades

Laubacher’s military career began after she graduated from the United States Naval Academy in 1990 with a degree in political science. She subsequently served in several intelligence, operational and command positions across the U.S. military.

According to her official U.S. Navy biography, she worked as an oceanographic watch officer and current operations officer at the Naval Facility Bermuda before taking up an intelligence collection management assignment at the Defense Intelligence Agency in Virginia. Her subsequent postings included assignments in the United Kingdom and Europe.

She joined the Navy Reserve in 1998 and served in intelligence and command positions supporting several joint military commands, including U.S. Space Command, U.S. Strategic Command and U.S. Pacific Command.

In 2009, Laubacher deployed to Afghanistan in support of Operation Enduring Freedom. She served as the officer in charge of operational coordination with the Afghan National Security Forces and the ministries of defense and interior within a special operations joint task force.

Her career also included a diplomatic assignment in South Asia. From June 2019 to June 2022, she served as Senior Defense Official and Defense Attaché to India, representing U.S. defense interests and supporting military and security cooperation between Washington and New Delhi.

Laubacher’s final assignment was as Special Assistant to the President and Senior Director for South Asia at the National Security Council, a position she held from October 2022 to May 2024. She retired from the U.S. Navy in 2024.

From Republican to Democratic Candidate

Despite her long military career, Laubacher’s entry into electoral politics followed a change in her political affiliation. A former registered Republican, she later became unaffiliated before registering as a Democrat on March 27, 2025, according to reporting on her political background.

Laubacher announced her congressional campaign in May 2025, challenging Boebert for the 4th Congressional District seat. She presented herself as a moderate candidate, emphasizing public service, national security experience and a less confrontational approach to politics.

Strong Fundraising and Local Support Drove Victory

Fundraising and support in key parts of the district played important roles in Laubacher’s campaign. Laubacher raised more than 10 times as much as Boebert through June 2026, giving her a substantial financial advantage during the campaign.

Douglas County also proved pivotal. Laubacher secured approximately 109,600 votes in the county, around 22,056 more than Boebert. The result demonstrated her ability to attract support in an area that has traditionally favored Republican candidates.

Laubacher declared victory on Monday, Nov. 9, while attending the U.S. House’s freshman orientation in Washington, D.C. Boebert acknowledged the broader Republican losses following the election, telling reporters outside the Capitol, “We collectively failed.”

Democratic Gains Reshape Colorado’s Congressional Representation

Her victory also adds to the broader Republican setbacks in the 2026 midterm elections, which are expected to reshape the balance of power in Congress. The transition from military and national security service to elected office will bring a different set of responsibilities.

She will have to represent a geographically large district with rural and suburban communities, including voters whose political preferences have traditionally favored Republicans, and her ability to build support across those communities will be an important test as she prepares to take office.