The Democratic Senate majority grew with the projected victory by Democrat Troy Jackson over Republican Senator Susan Collins in Maine, after Collins called Jackson and conceded defeat before the Associated Press (AP) projection.

In Kansas, Democrat Adam Hamilton won 51.9% of the vote against 45.2% for Republican Roger Marshall, the first Democrat elected senator from the state since 1932. In Ohio, Democrat Sherrod Brown defeated Senator Jon Husted and returns to the Senate, in a special election for the final two years of the term JD Vance won in 2022. In Iowa, Democrat Josh Turek defeated Republican Ashley Hinson, according to the Associated Press.