Wisconsin State Senate District 15

Tue, Nov 3 · Represented by Mark Spreitzer Democratic · Member list as of Oct 28

Scott FlemingRepublican

No published poll names both candidates.Last result · 2022 general: Mark Spreitzer (D) 61.4, Mark Trofimchuck (R) 38.5

Mark SpreitzerDemocratic · Incumbent4 years since first win

Show all 3 candidates on the ballot

Mark SpreitzerIncumbentDemocratic
Scott FlemingRepublican
Christopher DeanIndependent

Showing major-party nominees, incumbents and candidates with 5%+ in the latest poll or comparable fundraising.

Last election: Mark Spreitzer (Democratic) won by 22.9 points, 2022
On the 2026 ballot: 3 candidates

All State Senate districts

Side by side

Left column: FlemingRight column: Spreitzer

Donor-based spectrum: LiberalCentristConservativeSpreitzerNo published score for Fleming
Races: None listed; Won 5 of 5
Years since first win: Not available; 4

How these are counted

The spectrum is a published research score, not our rating. How this works. Wins and losses count the races in our results files, the same as each profile.

More about this race

Candidates on the ballot

Mark SpreitzerIncumbentDemocratic
Scott FlemingRepublican
Christopher DeanIndependent

Source: elections.wi.gov, dated Oct 6

Vote in Wisconsin

Trouble voting? Election Protection hotline: 866-OUR-VOTE. A nonpartisan coalition of civil-rights and voting-rights groups, not a government service. 866ourvote.org

Official results for Wisconsin

History (14 elections for this seat)

Votes for listed candidates: 75,260
Election day: November 8, 2022
District map: Older district map (2022)

Wisconsin Senate District 15, 1970 to 2022, 2022, every candidate
Candidate	Party	Votes and share	Share
DemocraticMark SpreitzerWon	Democratic	46,19261.4%	61.4%
RepublicanMark Trofimchuck	Republican	29,00638.5%	38.5%
Scattered write-ins	Write-in	620.1%	0.1%

Votes for listed candidates: 55,343
Election day: November 6, 2018
District map: Older district map (2012 to 2021)

Wisconsin Senate District 15, 1970 to 2022, 2018, every candidate
Candidate	Party	Votes and share	Share
DemocraticJanis RinghandWon(incumbent)	Democratic	53,45896.6%	96.6%
Scattered write-ins	Write-in	1,8813.4%	3.4%
OtherGregory Alan Neumann	Other	40.0%	0.0%

Votes for listed candidates: 61,187
Election day: November 4, 2014
District map: Older district map (2012 to 2021)

Wisconsin Senate District 15, 1970 to 2022, 2014, every candidate
Candidate	Party	Votes and share	Share
DemocraticJanis RinghandWon	Democratic	36,38959.5%	59.5%
RepublicanBrian Fitzgerald	Republican	24,76040.5%	40.5%
Scattered write-ins	Write-in	380.1%	0.1%

Votes for listed candidates: 54,117
Election day: November 2, 2010
District map: Older district map (2002 to 2011)

Wisconsin Senate District 15, 1970 to 2022, 2010, every candidate
Candidate	Party	Votes and share	Share
DemocraticTim CullenWon	Democratic	31,91859.0%	59.0%
RepublicanRick Richard	Republican	22,18141.0%	41.0%
Scattered write-ins	Write-in	180.0%	0.0%

Votes for listed candidates: 57,352
Election day: November 7, 2006
District map: Older district map (2002 to 2011)

Wisconsin Senate District 15, 1970 to 2022, 2006, every candidate
Candidate	Party	Votes and share	Share
DemocraticJudith B. RobsonWon(incumbent)	Democratic	39,16568.3%	68.3%
RepublicanGregory Addie	Republican	18,18731.7%	31.7%

Votes for listed candidates: 51,772
Election day: November 5, 2002
District map: Older district map (2002 to 2011)

Wisconsin Senate District 15, 1970 to 2022, 2002, every candidate
Candidate	Party	Votes and share	Share
DemocraticJudith B. RobsonWon(incumbent)	Democratic	33,49164.7%	64.7%
RepublicanGregory A. Black	Republican	18,28135.3%	35.3%

Votes for listed candidates: 50,628
Election day: November 3, 1998
District map: Older district map (1992 to 2001)

Wisconsin Senate District 15, 1970 to 2022, 1998, every candidate
Candidate	Party	Votes and share	Share
DemocraticJudith B. RobsonWon	Democratic	27,29553.9%	53.9%
RepublicanWilliam J. Sodemann	Republican	23,33346.1%	46.1%

Votes for listed candidates: 44,165
Election day: November 8, 1994
District map: Older district map (1992 to 2001)

Wisconsin Senate District 15, 1970 to 2022, 1994, every candidate
Candidate	Party	Votes and share	Share
RepublicanTimothy L. WeedenWon(incumbent)	Republican	29,36666.5%	66.5%
DemocraticMichael D. Brennan	Democratic	14,79933.5%	33.5%

Votes for listed candidates: 34,658
Election day: November 6, 1990
District map: Older district map (1984 to 1991)

Wisconsin Senate District 15, 1970 to 2022, 1990, every candidate
Candidate	Party	Votes and share	Share
RepublicanTimothy L. WeedenWon	Republican	20,84660.1%	60.1%
DemocraticGary Titley	Democratic	13,81239.9%	39.9%

Votes for listed candidates: 37,451
Election day: November 4, 1986
District map: Older district map (1984 to 1991)

Wisconsin Senate District 15, 1970 to 2022, 1986, every candidate
Candidate	Party	Votes and share	Share
DemocraticTimothy F. CullenWon(incumbent)	Democratic	23,75563.4%	63.4%
RepublicanMichael Clumpner	Republican	13,69636.6%	36.6%

Votes for listed candidates: 41,418
Election day: November 2, 1982
District map: Older district map (1982 to 1983)

Wisconsin Senate District 15, 1970 to 2022, 1982, every candidate
Candidate	Party	Votes and share	Share
DemocraticTimothy F. CullenWon(incumbent)	Democratic	25,46361.5%	61.5%
RepublicanMichael Clumpner	Republican	15,95438.5%	38.5%
Scattered write-ins	Write-in	10.0%	0.0%

Votes for listed candidates: 38,570
Election day: November 7, 1978
District map: Older district map (1972 to 1981)

Wisconsin Senate District 15, 1970 to 2022, 1978, every candidate
Candidate	Party	Votes and share	Share
DemocraticTimothy F. CullenWon(incumbent)	Democratic	22,75959.0%	59.0%
RepublicanR. Casey Olson	Republican	15,80941.0%	41.0%
Scattered write-ins	Write-in	20.0%	0.0%

Votes for listed candidates: 33,916
Election day: November 4, 1974
District map: Older district map (1972 to 1981)

Wisconsin Senate District 15, 1970 to 2022, 1974, every candidate
Candidate	Party	Votes and share	Share
DemocraticTimothy F. CullenWon	Democratic	18,93155.8%	55.8%
RepublicanJames D. Swan(incumbent)	Republican	14,98244.2%	44.2%
Scattered write-ins	Write-in	30.0%	0.0%

Votes for listed candidates: 45,530
Election day: November 3, 1970
District map: Older district map (1964 to 1971)

Wisconsin Senate District 15, 1970 to 2022, 1970, every candidate
Candidate	Party	Votes and share	Share
RepublicanJames D. SwanWon(incumbent)	Republican	24,08352.9%	52.9%
DemocraticRaymond W. Brandt	Democratic	21,44747.1%	47.1%

1970 to 2022: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), retrieved Oct 28, 2026. Compiled by Carl Klarner (Harvard Dataverse) from official returns; not an official source

Only part of this chamber is up in a given cycle. Which districts vote on which date is not on file. Last contest in this district on file: 2022.

Download and cite

CC BY 4.0 State data (JSON)Share image (PNG)

Cite this page

Election Wrld. (2026). Wisconsin State Senate District 15, election results 1970 to 2022. https://www.electionwrld.com/wi/senate/15. Retrieved October 31, 2026.

Embed this seat

<iframe src="https://www.electionwrld.com/embed/wi/senate/15" title="Wisconsin Senate District 15" width="100%" height="400" style="border:0;max-width:640px" loading="lazy"></iframe>
<p style="font-size:13px">Data: <a href="https://www.electionwrld.com">Election Wrld</a>, CC BY 4.0</p>

Paste this into any web page. It shows the seat, its last result and the next election.

Sources

Sources: Census TIGERweb Legislative MapServer (120th CDs layer 0, 119th CDs layer 4, 2026 SLD upper layer 1 and lower layer 2) (US Census Bureau, public domain), retrieved Oct 28, 2026; Open Civic Data division identifiers (census_autogenerated us_sldl/us_sldu and openstates state files); also (sld-recent.json): Open Civic Data division identifiers (country-us) (CC0 (repository); also (sld-recent.json): CC0 1.0), retrieved Oct 28, 2026; Open States people (current) CSVs (CC0-1.0 (Open States people data)), retrieved Oct 28, 2026, compiled by Open States volunteers and staff (rosters from state legislature sites) from official returns, not an official source; State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse) (CC0 1.0), retrieved Oct 28, 2026, compiled by Carl Klarner (Harvard Dataverse) from official returns, not an official source.

District id: ocd-division/country:us/state:wi/sldu:15

DataState data (JSON)Sources: State Legislative Election Returns, 1967-2022 (Carl Klarner, Harvard Dataverse), DIME (ODC-BY)Data as of Oct 28, 2026