2026 United States Senate election in South Dakota

For related races, see 2026 United States Senate elections.
Not to be confused with 2026 South Dakota Senate election.
2026 United States Senate election in South Dakota
November 3, 2026
 
Party Republican Democratic
Incumbent U.S. senator

Mike Rounds
Republican



Elections in South Dakota
Federal government
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  • 2023

The 2026 United States Senate election in South Dakota will be held on November 3, 2026, to elect a member of the United States Senate to represent the state of South Dakota. Two-term Republican Mike Rounds was re-elected in 2020 with 65.8% of the vote and has not stated whether he will run for re-election.

Republican primary

Candidates

Filed paperwork

  • William Beauford[1]

Publicly expressed interest

Potential

Endorsements

Mike Rounds (not declared)
U.S. presidents

Fundraising

Campaign finance reports as of June 30, 2025
Candidate Raised Spent Cash on hand
Mike Rounds (R) $2,211,882 $1,391,226 $2,503,178
Source: Federal Election Commission[5]

Democratic primary

Candidates

Declared

Fundraising

Campaign finance reports as of June 30, 2025
Candidate Raised Spent Cash on hand
Julian Beaudion (D) $85,413 $41,688 $43,725
Source: Federal Election Commission[5]

Independents

Candidates

Declared

Fundraising

Campaign finance reports as of June 30, 2025
Candidate Raised Spent Cash on hand
Brain Bengs (I) $78,117 $59,502 $18,615
Source: Federal Election Commission[5]

General election

Predictions

Source Ranking As of
Inside Elections[8] Solid R January 17, 2025
The Cook Political Report[9] Solid R February 13, 2025
Sabato's Crystal Ball[10] Safe R February 13, 2025
Race To The WH[11] Safe R April 30, 2025

References

  1. ^ "BEAUFORD, WILLIAM TREMEYNE MR III - Candidate overview". FEC.gov. January 1, 2019. Retrieved May 18, 2025.
  2. ^ Santella, Dan (April 23, 2025). "Sen. Rounds looks at '25 dynamics, says no gubernatorial run in '26". KELO-TV. Retrieved April 30, 2025. Asked if he's running for reelection, Rounds keeps that door wide open. "I'll wait a little bit before I make a formal announcement," he said.
  3. ^ https://www.dakotanewsnow.com/2023/06/12/sd-republican-voters-share-preferences-potential-2026-primary-matchups/
  4. ^ Dakota War College (July 21, 2025). "After GOP pokes at him on Facebook, President Trump has high and undenaible praise for Senator Rounds". Dakota War College. Retrieved July 21, 2025.{{cite web}}: CS1 maint: url-status (link)
  5. ^ a b c "2026 Election United States Senate - South Dakota". fec.gov. Federal Election Commission. Retrieved July 21, 2025.
  6. ^ Dausch, Dominik (April 10, 2025). "Democrat Julian Beaudion announces US Senate run for Republican Mike Rounds' seat in 2026". Argus Leader. Retrieved April 30, 2025.
  7. ^ Dausch, Dominik (April 30, 2025). "Former Democrat Brian Bengs launches independent bid for Mike Rounds' Senate seat in 2026". Argus Leader. Retrieved April 30, 2025.
  8. ^ "Senate Ratings". Inside Elections. Retrieved April 30, 2025.
  9. ^ "2026 CPR Senate Race Ratings". Cook Political Report. Retrieved April 30, 2025.
  10. ^ "2026 Senate ratings". Sabato's Crystal Ball. Retrieved February 13, 2025.
  11. ^ "2026 Senate Forecast". Race to the WH. Retrieved April 30, 2025.
Official campaign websites
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