Marklein, Jacobson Vie for Key Wisconsin Senate Seat
Republican incumbent Howard Marklein and Democrat Jenna Jacobson face off Tuesday in the 17th Senate District, a race that could determine control of the state Senate.
Updated on Nov. 3, 2026 in Elections
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Republican Howard Marklein and Democrat Jenna Jacobson compete in Wisconsin's 17th State Senate District on Tuesday, November 3, 2026. Their contest will help determine which party controls the state Senate.
Why it matters
The 17th District is viewed by state parties and legislative committees as central to control of the entire state Senate, which is driving heavy campaign spending. The outcome will shape the balance of power in the Wisconsin Legislature.
Both candidates have raised more than $5 million combined in direct fundraising, with recent contributions of more than $167,000 for Marklein and more than $162,000 for Jacobson since October 27. The race could approach the 2024 spending record of $7.8 million, though final totals remain unknown until after the vote.
The players
Howard Marklein
Marklein is the Republican incumbent in the 17th Senate District and serves as co-chair of the Joint Committee on Finance, a powerful panel that shapes state budget decisions.
Jenna Jacobson
Jacobson is the Democratic candidate in the race and currently serves as a state representative for the 50th Assembly District.
The details
The 17th Senate District covers Crawford, Grant, Green, Lafayette and Iowa counties and part of Dane County, with lines redrawn in 2024. Both candidates have focused on door-to-door campaigning and both voted early absentee, while much of the money comes from state parties and legislative committees.
Timeline
2024: District boundaries redrawn and record Senate spending set in District 8.
October 27, 2026: Recent week of additional campaign contributions begins.
November 3, 2026: Election day in the 17th Senate District.
Political Context
The race takes place under the Senate district lines redrawn in 2024, and the 17th District's new boundaries are central to the contest. Opposition concerns and counter-arguments were not addressed in the source.
The outcome of this race will determine which party holds a majority in the state Senate, affecting the legislation that passes and the state budget decisions Wisconsin residents live under. Voters in Crawford, Grant, Green, Lafayette, Iowa and part of Dane counties will decide the contest on Tuesday.
The takeaway
Because the 17th District is seen as pivotal to statewide Senate control, voters in these counties will have a direct role in shaping the chamber's direction when they cast ballots on Tuesday, November 3.
Further reading
For more on how control of the chamber is being contested, see Elections coverage across Wisconsin.
Source note: This article includes information reported by Wmtv15news.
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