Democrat Adam Hamilton wins Kansas Senate seat, defeating Roger Marshall

Democrat Adam Hamilton has won the US Senate race in Kansas, unseating Republican incumbent Roger Marshall, according to a race call by the Associated Press. The result was reported on 4 November 2026. Hamilton, a pastor, will become the first Democrat to represent Kansas in the chamber since 1932.

Marshall is considered a staunch supporter of President Donald Trump. The contest was among the most closely watched Senate races of the year, and the Cook Political Report rated it a toss-up before the vote.

Kansas emerged this year as a surprise battleground, with Democrats pushing to regain control of the Senate. The state has long been reliably Republican, which made the result stand out. Cook said several agriculture-heavy areas had been hit hard by high fuel and fertiliser prices, which it linked to the Trump administration's conflict with Iran.

The Senate race drew attention because the outcome of the chamber's balance of power depended on contests like this one. Kansas had not sent a Democrat to the Senate for nearly a century, so Hamilton's win marks a break with that long pattern.

It is not yet known how large Hamilton's margin of victory was, or how many votes each candidate received. It is also not yet clear how the result will affect the overall balance of the Senate, which depends on results across all contested seats.