Adam Hamilton unseats Roger Marshall in historic Kansas Senate election

Democratic Reverend Adam Hamilton defeated incumbent Republican Senator Roger Marshall in Kansas, marking the first time in 94 years that a Democrat has won a U.S. Senate seat in the state.

Adam Hamilton, a 62-year-old minister who leads the country's largest United Methodist congregation, pulled off an upset victory in a state Donald Trump won by 16 points in 2024. According to NBC News and CBS News projections, Hamilton is the first Democrat elected to the Senate from Kansas since 1932. The victory for the first-time candidate helps secure the Democratic majority in the Senate.

A centrist who was registered as a Republican until earlier this year, Hamilton focused his campaign on affordability and garnered support from former GOP governors Bill Graves and Mike Hayden. NBC News reported that Hamilton and his supporters criticized Marshall over high diesel and beef prices caused by the war with Iran. They also highlighted healthcare cuts found in legislation Republicans passed last year.

Senator Roger Marshall, a 66-year-old doctor who had served in the Senate since 2020, faced significant challenges during the campaign. A New York Times investigation reported that Marshall had sued more than 700 of his patients over unpaid bills. While Marshall dismissed the report as a "hit job" and his attorney denied involvement in resulting arrest warrants, the issue became a central point of criticism from Democrats.

The race became highly competitive in its final weeks, prompting national Republican groups to redirect millions of dollars to defend the seat. Marshall attempted to distance himself from the president on immigration issues, but ultimately could not overcome the challenge from Hamilton. Before entering the Senate, Marshall had represented Kansas in the House of Representatives starting in 2017.

Background

Kansas last elected a Democrat to the U.S. Senate in 1932. While the state has a long conservative history in federal elections, it has recently elected Democrat Laura Kelly to two terms as governor.