2026 United States House of Representatives election in South Dakota

2026 United States House of Representatives election in South Dakota's at-large district

←  2024 November 3, 2026 2028 →

Party Republican Democratic

Incumbent U.S. Representative Dusty Johnson Republican

The 2026 United States House of Representatives election in South Dakota is scheduled to be held on November 3, 2026, to elect a member of the United States House of Representatives to represent the state of South Dakota from its at-large congressional district . The election will coincide with other elections held on the same date. The primary elections will be held on June 2, 2026, and in races where no candidate receives over 50% in a primary, runoff elections will take place on July 28. ^[1]

Incumbent Republican representative Dusty Johnson was re-elected with 72.0% of the vote in 2024. ^[2]

Republican primary

Candidates

Declared

• James Biolata, small business owner and real estate investor, unsuccessful Pennington County Commission and County Auditor candidate ^[3]
• Casey Crabtree, state senator from the 8th district (2020–present) and former Majority Leader of the South Dakota Senate (2023–2025) ^[4]
• Marty Jackley, South Dakota Attorney General (2009–2019, 2023–present) and candidate for governor in 2018 ^[5]

Filed paperwork

• Gavin Solomon, businessman from New York ^[6]

Potential

• Amber Hulse, state senator from the 30th district (2025–present) ^[7]
• Tony Venhuizen, Lieutenant Governor of South Dakota (2025–present) ^[7]

Declined

• Dusty Johnson, incumbent U.S. representative (running for governor) ^[8]

Fundraising

Campaign finance reports as of September 30, 2025
Candidate	Raised	Spent	Cash on hand
Casey Crabtree (R)	$206,271	$25,143	$181,128
Marty Jackley (R)	$525,979	$22,600	$503,379
Source: Federal Election Commission [9]

Polling

Poll source	Date(s) administered	Sample size [a]	Margin of error	James Bialota	Casey Crabtree	Marty Jackley	Undecided
Mason-Dixon [10] [A]	October 16–20, 2025	502 (RV)	± 4.5%	2%	5%	57%	36%

Hypothetical polling

Poll source	Date(s) administered	Sample size [a]	Margin of error	Casey Crabtree	Marty Jackley	Tony Venhuizen	Undecided
Guidant Polling [11]	June 17–19, 2025	400 (LV)	± 4.9%	5%	48%	5%	42%

Democratic primary

Candidates

Declared

• Nikki Gronli, former South Dakota state director for USDA Rural Development (2022–2025) and former vice chair of the South Dakota Democratic Party ^[12]
• Billy Mawhiney, nonprofit executive ^[13]

Filed paperwork

• Scott Schlagel, former correctional officer ^[14]

Fundraising

Campaign finance reports as of September 30, 2025
Candidate	Raised	Spent	Cash on hand
Nikki Gronli (D)	$23,171	$2,634	$20,537
Billy Mawhiney (D)	$17,106	$8,644	$8,462
Source: Federal Election Commission [9]

Independents

Candidates

Filed paperwork

• Jack Pittman ^[15]

General election

Predictions

Source	Ranking	As of
The Cook Political Report [16]	Solid R	July 10, 2025
Inside Elections [17]	Solid R	July 10, 2025
Sabato's Crystal Ball [18]	Safe R	July 10, 2025
Race to the WH [19]	Safe R	October 11, 2025

Notes

1. Key:
   A – all adults
   RV – registered voters
   LV – likely voters
   V – unclear

Partisan clients

1. Poll sponsored by South Dakota News Watch and the University of South Dakota

References

1. "South Dakota 2026 General Election". The Green Papers. Retrieved June 13, 2025.
2. "2024 House Vote Tracker". Cook Political Report . Retrieved June 13, 2025.
3. "New congressional candidate: James Biolata will take down 'Big Brother' AND his little brother at the park!". SD War College. July 3, 2025. Retrieved July 4, 2025.
4. Haiar, Joshua (September 15, 2025). "State senator from Madison formally launches congressional bid, pledges to be Trump ally". South Dakota Searchlight . Retrieved September 15, 2025.
5. Dausch, Dominik (June 27, 2025). "Marty Jackley plans to run for US Rep. Dusty Johnson's job. Here's what we know". Argus Leader .
6. "Statement of Candidacy". August 22, 2025
7. Sneve, Joe (June 29, 2025). "What Marty Jackley's congressional run tells us about the 2026 GOP primary". Sioux Falls Live. Retrieved July 1, 2025.
8. Hill, Meredith Lee (June 27, 2025). "Rep. Dusty Johnson to announce a bid for South Dakota governor Monday". Politico . Retrieved June 28, 2025.
9. "2026 Election United States House - South Dakota at-large". fec.gov. Federal Election Commission . Retrieved October 27, 2025.
10. Killough, Kevin (October 29, 2025). "House poll: Jackley leads with many undecided". South Dakota News Watch. Retrieved October 30, 2025.
11. "New poll shows Jackley leading potential candidates for U.S. House". KDLT-TV. June 27, 2025. Retrieved June 28, 2025.
12. Huber, Makenzie (September 8, 2025). "Former USDA appointee announces Democratic bid for Congress". South Dakota Searchlight . Retrieved September 8, 2025.
13. Deinken, Asher (August 28, 2025). "New candidate enters the Congressional race". KELO-TV . Retrieved August 28, 2025.
14. "Dell Rapids Democrat Scott Schlagel files paperwork to start campaign for Congress". South Dakota War College. April 7, 2025. Retrieved October 1, 2025.
15. "FEC Form 2 for Report FEC-1926817". docquery.fec.gov. Retrieved November 24, 2025.
16. "2026 CPR House Race Ratings". Cook Political Report. Retrieved July 10, 2025.
17. "2026 House Ratings". Inside Elections.
18. "2026 House". Sabato's Crystal Ball. Retrieved July 10, 2025.
19. "The 2026 House Forecast". Race to the WH. Retrieved October 11, 2025.

External links

Official campaign websites

• Casey Crabtree (R)
• Nikki Gronli (D)
• Marty Jackley (R)
• Billy Mawhiney (D)