Ten Incumbents Ousted in Republican Primaries for South Dakota House of Representatives
All 70 seats in the South Dakota House of Representatives are up this year.
The Democratic and Republican primaries occurred today in South Dakota to select candidates for the November 2026 general election. This post covers the races for all 70 seats in the State House of Representatives. In the Mount Rushmore State, parties can nominate two candidates for each legislative district in the State House (with the exemption of Districts 26 and 28). Separate posts will be covering the primaries for federal and statewide executive offices, all 35 seats in the State Senate, and county contests.
The general election for all 70 seats in the South Dakota House of Representatives will be held on November 3, 2026.
District 1:
Navy veteran Courtney Enfield won the Democratic primary.
Incumbent Nicholas Fosness and Day County Commissioner Daniel Kjos won the Republican primary with 29.6% (1,855) and 26.5% (1,664) against incumbent Logan Manhart with 22.3% (1,398) and business owner Keith Miller with 21.6% (1,355). 6,272 votes counted.
District 2:
Teacher Blake Rife won the Democratic primary.
Business owner Adam Long and engineer Manuel Luschas won the Republican primary with 32.6% (2,004) and 26.6% (1,634) against business executive Brandon Lane with 22.7% (1,394) and physician Dawn Hill with 18.2% (1,120). 6,152 votes counted.
District 3:
2024 nominee Erin Rudner won the Democratic primary.
Architect Spencer Sommers and business owner Tim Hanigan won the Republican primary with 32.2% (2,217) and 28.7% (1,980) against incumbent Al Novstrup with 23.2% (1,598) and former State Representative Kaleb Weis with 15.9% (1,095). 6,890 votes counted.
District 4:
Pastor Emelia Enquist won the Democratic primary.
Farmer Ryan Kohl and former State Representative Fred Deutsch won the Republican primary with 26.4% (2,385) and 25.7% (2,326) against incumbent Kent Roe with 24.9% (2,254), incumbent Dylan Jordan with 20.3% (1,837), and workforce development consultant Gary Hudiburgh with 2.6% (233). 9,035 votes counted.
District 5:
No candidate qualified for the Democratic primary.
Incumbent Matt Roby and former State Representative Byron Callies won the Republican primary.
District 6:
2024 nominee Garret Campbell and plumber Austin Wolf won the Democratic primary.
Sioux Falls traffic, light & power superintendent Jerry Jongeling and business owner Elliott Neff and won the Republican primary with 33.3% (1,413) and 32.7% (1,390) against business owner Ned Horsted with 17.4% (737) and incumbent Tim Czmowski with 16.6% (707). 4,247 votes counted.
District 7:
2024 nominee Blake Stevens won the Democratic primary.
Incumbent Mellissa Heermann and incumbent Roger DeGroot won the Republican primary with 38.6% (1,683) and 38.5% (1,678) against chiropractor Dennis Willert with 22.9% (1,001). 4,362 votes counted.
District 8:
No candidate qualified for the Democratic primary.
Attorney Todd Wilkinson and former Lake Preston school board chair Jon Nelson won the Republican primary with 37.4% (2,657) and 22.6% (1,606) against attorney Danny Brown with 18.2% (1,293), architect Samuel Krueger with 11.0% (778), and former legislative staffer James Sapp with 10.8% (765). 7,099 votes counted.
District 9:
Marketing manager Amanda Potter won the Democratic primary.
Incumbent Tesa Schwans and business owner Megan Tschetter won the Republican primary with 33.2% (1,541) and 26.9% (1,247) against healthcare executive Randy Bury with 21.9% (1,017) and loan officer Zach Mulder with 18.0% (836). 4,641 votes counted.
District 10:
Consultant Adam Bair and nurse Kathleen Brudvig won the Democratic primary.
Business executive John Pohlman and business owner Kimberly Petterson won the Republican primary with 34.9% (948) and 33.4% (908) against incumbent Bobbi Andera with 31.7% (862). 2,718 votes counted.
District 11:
2024 nominee Sonja Mentzer won the Democratic primary.
Incumbent Keri Weems and incumbent Brian Mulder won the Republican primary with 38.4% (1,589) and 38.3% (1,582) against software engineer John Kunnari with 23.3% (963). 4,134 votes counted.
District 12:
Conservationist Stephanie Arne won the Democratic primary.
Incumbent Amber Arlint and finance executive Kerry Loudenslager won the Republican primary.
District 13:
2024 state senate nominee Ali Horsted won the Democratic primary.
Incumbent Jack Kolbeck and incumbent John Hughes won the Republican primary with 35.3% (2,237) and 33.4% (2,118) against nonprofit executive Nick Kotzea with 31.4% (1,991). 6,346 votes counted.
District 14:
Business owner Erinn Williams won the Democratic primary.
Incumbent Taylor Rae Rehfeldt and former State Representative Tyler Tordsen won the Republican primary with 42.6% (2,457) and 29.1% (1,678) against incumbent Tony Kayser with 28.2% (1,626). 5,761 votes counted.
District 15:
Incumbent Kadyn Wittman and public safety official June CopperStad won the Democratic primary.
2022/24 nominee Joni Tschetter and data analyst Andre Zachariahs won the Republican primary.
District 16:
Principal Tim Rhead won the Democratic primary.
Farmer Lisa Bogue and incumbent John Shubeck won the Republican primary with 36.7% (2,273) and 32.0% (1,986) against farmer Jason VanDenTop with 31.3% (1,940). 6,199 votes counted.
District 17:
Computer technician Austin Brunick and business owner Leslie Gerrish won the Democratic primary.
Incumbent Chris Kassin and pharmacist Troy Redler won the Republican primary with 60.2% (2,133) and 31.1% (1,106) against environmental director Robin Schiro with 8.7% (307). 3,546 votes counted.
District 18:
Yankton County party official Jarod Holcomb and Air Force veteran Karen Springer won the Democratic primary.
Incumbent Mike Stevens and project manager John Marquardt won the Republican primary with 41.3% (2,256) and 31.5% (1,719) against Turkey Valley Township supervisor Michael Nutley with 27.2% (1,486). 5,461 votes counted.
District 19:
Customer service representative Heidi Hora won the Democratic primary.
Incumbent Jessica Bahmuller and incumbent Drew Peterson won the Republican primary with 44.5% (3,384) and 36.4% (2,765) against farmer Tanner Hento with 19.0% (1,447). 7,596 votes counted.
District 20:
No candidate qualified for the Democratic primary.
Incumbent Jeff Bathke and business executive Terry Sabers won the Republican primary.
District 21:
No candidate qualified for the Democratic primary.
Incumbent Marty Overweg and incumbent Jim Halverson won the Republican primary with 35.1% (3,221) and 30.1% (2,761) against rancher John Harter with 22.4% (2,053) and rancher Wyatt DeJong with 12.5% (1,147). 9,182 votes counted.
District 22:
Paramedic Cully Williams won the Democratic primary.
Incumbent Lana Greenfield and incumbent Kevin Van Diepen won the Republican primary.
District 23:
No candidate qualified for the Democratic primary.
Incumbent Spencer Gosch and former State Representative Dick Werner won the Republican primary with 44.2% (3,870) and 28.6% (2,503) against Miller school board member Amber Werdel with 27.2% (2,388). 8,761 votes counted.
District 24:
No candidate qualified for the Democratic primary.
Incumbent Mike Weisgram and former Pierre mayor Laurie Gill won the Republican primary with 32.6% (3,706) and 23.1% (2,626) against farmer Regan Bollweg with 20.5% (2,329), former State Representative Tim Rounds with 16.0% (1,824), and mechanical engineer Brian Burge with 7.8% (893). 11,378 votes counted.
District 25:
No candidate qualified for the Democratic primary.
Former DHS agent Nick Buchholz and attorney Carrie Sanderson won the Republican primary with 34.7% (1,986) and 33.6% (1,922) against former Flandreau city councilmember Bart Sample with 31.8% (1,819). 5,727 votes counted.
District 26A:
Incumbent Eric Emery won the Democratic primary.
2024 nominee Ron Frederick won the Republican primary.
District 26B:
Tribal leader Lewis GrassRope won the Democratic primary.
Chamberlain-Oacoma Chamber of Commerce official Angi Hanzlik won the Republican primary with 53.7% (882) against business owner Will Mahnke with 46.3% (760). 1,642 votes counted.
District 27:
No candidate qualified for the Democratic primary.
Incumbent Elizabeth May won the Republican primary.
District 28A:
2024 nominee Carl Petersen won the Democratic primary.
Incumbent Jana Hunt won the Republican primary.
District 28B:
No candidate qualified for the Democratic primary.
Incumbent Travis Ismay won the Republican primary with 54.9% (1,597) against business owner Lawrence Schmaltz with 45.1% (1,313). 2,910 votes counted.
District 29:
No candidate qualified for the Democratic primary.
Rancher Gary Deering and former State Representative Gary Cammack won the Republican primary with 28.0% (2,198) and 27.2% (2,135) against incumbent Kathy Rice with 24.9% (1,957) and incumbent Terri Jorgenson with 20.0% (1,572). 7,862 votes counted.
District 30:
2022 nominee Bret Swanson won the Democratic primary.
Incumbent Tim Goodwin and incumbent Trish Ladner won the Republican primary with 39.2% (3,708) and 36.4% (3,450) against business owner Stephen Saint with 24.4% (2,313). 9,471 votes counted.
District 31:
Graduate student Morgan Plucker won the Democratic primary.
Incumbent Mary Fitzgerald and incumbent Scott Odenbach won the Republican primary.
District 32:
Incumbent Nicole Uhre-Balk won the Democratic primary.
Incumbent Steve Duffy and real estate broker Zachary Martin won the Republican primary.
District 33:
Health advocate Kari Hall won the Democratic primary.
Incumbent Phil Jensen and incumbent Curt Massie won the Republican primary with 30.6% (2,285) and 26.6% (1,988) against former state National Guard adjutant general Jeff Marlette with 26.6% (1,983) and business owner Sandra Comer with 16.2% (1,205). 7,461 votes counted.
District 34:
Tribal representative Victor Dominquez won the Democratic primary.
Incumbent Mike Derby and former State Representative Becky Drury won the Republican primary with 42.4% (2,710) and 29.1% (1,861) against incumbent Heather Baxter with 28.4% (1,815). 6,386 votes counted.
District 35:
Donor care supervisor Ken Jeakins won the Democratic primary.
South Dakota Right to Life associate director Dale Bartscher and business owner Jason Fleming won the Republican primary with 33.8% (1,241) and 32.8% (1,205) against Air Force veteran Jace West with 20.2% (744) and business development consultant Emmett Reistroffer with 13.2% (484). 3,674 votes counted.