The 2026 Wisconsin Senate election is scheduled to be held on Tuesday, November 3, 2026. Seventeen of the 33 seats in the Wisconsin Senate are up for election—the odd-numbered districts.
This election will be significantly affected by the legislative maps drawn as a result of the Wisconsin Supreme Court decision in "Clarke v. Wisconsin Elections Commission", which declared the current legislative district map to be unconstitutional on December 22, 2023. The court was in the process of selecting a remedial plan, when the legislature chose to embrace the remedial map proposal from Governor Tony Evers. Evers signed the plan into law on February 19, 2024.
Under the new maps, control of the Senate could go to either party due to Democratic gains in the 2024 Wisconsin Senate election.
Background.
Partisan Background.
In the 2024 US Presidential Election, Kamala Harris won 18 districts, while Donald Trump won 15. Republicans represented three districts where Harris had won in 2024: District 5 (Harris +5.81%), represented by Rob Hutton; District 17 (Harris +1.03%), represented by Howard Marklein; and District 21 (Harris +1.23%), represented by Van Wanggaard.
Redistricting.
This election will be significantly affected by the legislative maps drawn as a result of the Wisconsin Supreme Court decision in "Clarke v. Wisconsin Elections Commission", which declared the previous legislative district map to be unconstitutional on December 22, 2023. The court was in the process of selecting a remedial plan, when the legislature chose to embrace the remedial map proposal from Governor Tony Evers. Evers signed the plan into law on February 19, 2024.
2024 elections.
In 2024, Democrats gained four seats in the Senate under the new maps, with the expectation they would not be able to win a majority then because only even-numbered seats were up for election that year. During the 2024 campaign, both parties spent heavily on the competitive races in that cycle. As a result of the election, where Democrats gained four seats, Democrats were put on a path to win a majority in 2026, where three senate districts could determine the majority.
Democrats last won a majority of seats in the state senate in the 2012 recall elections, but they last seated a majority of seats in a session after the 2008 elections.
References.
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