Wisconsin Senate control hinges on six competitive districts
Seventeen Wisconsin Senate seats are on the Nov. 3 ballot, with Republicans defending an 18-15 majority. Democrats would need to flip at least two Republican-held districts without losing any of their own, while Republicans can afford to lose only one seat. Six districts are rated as battlegrounds, and this is the first election using maps redrawn after a 2023 state Supreme Court ruling.
Wisconsin elects its Senate in alternating groups, so not all members face voters in the same cycle. This is the first election for this set of seats since new maps were put in place following a 4-3 state Supreme Court ruling in December 2023. In 2024, Democrats gained four Senate seats and 10 Assembly seats.
Of the six districts Ballotpedia identifies as battlegrounds, Democrats hold one and Republicans hold five. Four are open, and two have incumbents running. The DLCC has targeted five seats, including one Democratic-held district, while the RSLC includes Wisconsin on its top defensive chambers list and targets three Republican-held districts.
Control of the Wisconsin Senate could affect how state budgets, education, health, and other policies are shaped for residents. With the chamber closely divided, voters in a handful of competitive districts may have unusual influence over which party sets the legislative agenda. The result could also change how the legislature works with the governor, potentially affecting negotiations and priorities.