Iowa State Senate District 19

Tue, Nov 3 · Represented by Ken Rozenboom Republican (not a candidate in 2026) · Member list as of Oct 28

Barb Kniff McCullaRepublican4 years since first win

No published poll names both candidates.Last result · 2022 general (different candidates): Ken Rozenboom (R) 68.6, Tyler Stewart (D) 31.4

Zachary MechamDemocratic

Last election: Ken Rozenboom (Republican) won by 37.2 points, 2022
On the 2026 ballot: 2 candidates

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Side by side

Left column: McCullaRight column: Mecham

Donor-based spectrum: LiberalCentristConservativeMcCullaNo published score for Mecham
Races: Won 2 of 2; None listed
Years since first win: 4; Not available

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

Open seat

The current holder, Ken Rozenboom, is not on the candidate list.

Zachary MechamDemocratic
Barb Kniff McCullaRepublican

Source: sos.iowa.gov (PDF), dated Aug 19

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Official results for Iowa

History (15 elections for this seat)

Votes for listed candidates: 26,419
Election day: November 8, 2022
District map: Older district map (2022)

Iowa Senate District 19, 1970 to 2022, 2022, every candidate
Candidate	Party	Votes and share	Share
RepublicanKen RozenboomWon(incumbent)	Republican	18,11868.6%	68.6%
DemocraticTyler Stewart	Democratic	8,28331.4%	31.4%
Scattered write-ins	Write-in	180.1%	0.1%

Votes for listed candidates: 36,206
Election day: November 6, 2018
District map: Older district map (2012 to 2021)

Iowa Senate District 19, 1970 to 2022, 2018, every candidate
Candidate	Party	Votes and share	Share
RepublicanJack WhitverWon(incumbent)	Republican	18,59851.4%	51.4%
DemocraticAmber Gustafson	Democratic	17,60848.6%	48.6%

Votes for listed candidates: 20,657
Election day: November 4, 2014
District map: Older district map (2012 to 2021)

Iowa Senate District 19, 1970 to 2022, 2014, every candidate
Candidate	Party	Votes and share	Share
RepublicanJack WhitverWon	Republican	16,74281.0%	81.0%
IndependentBrett H. Nelson	Independent	3,80218.4%	18.4%
Scattered write-ins	Write-in	1130.6%	0.6%

Iowa Senate District 19, 1970 to 2022, 2010, every candidate
Candidate	Party	Votes and share	Share
DemocraticRobert M. HoggWon(incumbent)	Democratic	15,48197.1%	97.1%
Scattered write-ins	Write-in	4622.9%	2.9%

Iowa Senate District 19, 1970 to 2022, 2006, every candidate
Candidate	Party	Votes and share	Share
DemocraticRobert M. HoggWon	Democratic	14,11259.2%	59.2%
RepublicanRenee Schulte	Republican	9,72140.8%	40.8%

Iowa Senate District 19, 1970 to 2022, 2002, every candidate
Candidate	Party	Votes and share	Share
RepublicanChuck LarsonWon	Republican	13,37557.1%	57.1%
DemocraticRenee V. Sneitzer	Democratic	10,04442.9%	42.9%

Iowa Senate District 19, 1970 to 2022, 1998, every candidate
Candidate	Party	Votes and share	Share
RepublicanSheldon RittmerWon(incumbent)	Republican	10,586100.0%	100.0%

Iowa Senate District 19, 1970 to 2022, 1994, every candidate
Candidate	Party	Votes and share	Share
RepublicanSheldon RittmerWon(incumbent)	Republican	11,307100.0%	100.0%

Iowa Senate District 19, 1970 to 2022, 1990, every candidate
Candidate	Party	Votes and share	Share
RepublicanSheldon RittmerWon	Republican	9,63153.9%	53.9%
DemocraticDouglas Olmsted	Democratic	8,22746.1%	46.1%

Votes for listed candidates: 16,442
Election day: November 4, 1986
District map: Older district map (1982 to 1991)

Iowa Senate District 19, 1970 to 2022, 1986, every candidate
Candidate	Party	Votes and share	Share
RepublicanNorman J. GoodwinWon(incumbent)	Republican	9,49257.7%	57.7%
DemocraticRobert Ryan	Democratic	6,95042.3%	42.3%

Votes for listed candidates: 18,982
Election day: November 2, 1982
District map: Older district map (1982 to 1991)

Iowa Senate District 19, 1970 to 2022, 1982, every candidate
Candidate	Party	Votes and share	Share
RepublicanNorman J. GoodwinWon(incumbent)	Republican	11,04458.2%	58.2%
DemocraticPatrick Leo Mullen	Democratic	7,93841.8%	41.8%

Votes for listed candidates: 15,464
Election day: November 7, 1978
District map: Older district map (1972 to 1981)

Iowa Senate District 19, 1970 to 2022, 1978, every candidate
Candidate	Party	Votes and share	Share
RepublicanJohn W. JensenWon	Republican	9,56461.9%	61.9%
DemocraticJerald Fuerstenberg	Democratic	5,90038.1%	38.1%

Votes for listed candidates: 18,230
Election day: November 4, 1974
District map: Older district map (1972 to 1981)

Iowa Senate District 19, 1970 to 2022, 1974, every candidate
Candidate	Party	Votes and share	Share
RepublicanClifford E. BurroughsWon	Republican	10,39257.0%	57.0%
DemocraticDonald D. Clark	Democratic	7,83843.0%	43.0%

Votes for listed candidates: 23,010
Election day: November 7, 1972
District map: Older district map (1972 to 1981)

Iowa Senate District 19, 1970 to 2022, 1972, every candidate
Candidate	Party	Votes and share	Share
RepublicanVernon H. KyhlWon(incumbent)	Republican	15,91769.2%	69.2%
DemocraticWilliam Hamm	Democratic	6,96030.3%	30.3%
OtherRobert Lauer	Other	1330.6%	0.6%

Votes for listed candidates: 17,518
Election day: November 3, 1970
District map: Older district map (1970 to 1971)

Iowa Senate District 19, 1970 to 2022, 1970, every candidate
Candidate	Party	Votes and share	Share
RepublicanFrancis MesserlyWon(incumbent)	Republican	9,42553.8%	53.8%
DemocraticMarvin E. Haugebak	Democratic	8,09346.2%	46.2%

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.

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Election Wrld. (2026). Iowa State Senate District 19, election results 1970 to 2022. https://www.electionwrld.com/ia/senate/19. Retrieved October 31, 2026.

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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:ia/sldu:19

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