2020 United States Senate election in South Dakota

The 2020 United States Senate election in South Dakota was held on November 3, 2020, to elect a member of the United States Senate to represent the State of South Dakota, concurrently with the 2020 U.S. presidential election, as well as other elections to the United States Senate, elections to the United States House of Representatives and various state and local elections. Incumbent Republican Senator Mike Rounds was reelected to a second term in office, overperforming Donald Trump in the concurrent presidential election by 4.93 points.

2020 United States Senate election in South Dakota

November 3, 2020
 
Nominee Mike Rounds Dan Ahlers
Party Republican Democratic
Popular vote 276,232 143,987
Percentage 65.7% 34.3%

County results
Rounds:      50–60%      60–70%      70–80%      80–90%      90–100%
Ahlers:      50–60%      70–80%      80–90%

U.S. senator before election

Mike Rounds
Republican

Elected U.S. Senator

Mike Rounds
Republican

Republican primary

Nominee

Eliminated in primary

Results

Results by county:
  Rounds—80–90%
  Rounds—70–80%
  Rounds—60–70%
  Rounds—50–60%
  Borglum—50–60%
Republican primary results[3]
Party Candidate Votes %
Republican Mike Rounds (incumbent) 70,365 75.23%
Republican Scyller Borglum 23,164 24.77%
Total votes 93,529 100.00%

Democratic primary

Nominee

Did not qualify

  • Clara Hart, board member of the Sioux Falls Arts Council[5]

Declined

Independents

Withdrew

General election

Predictions

Source Ranking As of
The Cook Political Report[10] Safe R October 29, 2020
Inside Elections[11] Safe R October 28, 2020
Sabato's Crystal Ball[12] Safe R November 2, 2020
Daily Kos[13] Safe R October 30, 2020
Politico[14] Safe R November 2, 2020
RCP[15] Safe R October 23, 2020
DDHQ[16] Safe R November 3, 2020
538[17] Safe R November 2, 2020
Economist[18] Safe R November 2, 2020

Polling

Poll source Date(s)
administered
Sample
size[lower-alpha 1]
Margin
of error
Mike
Rounds (R)
Dan
Ahlers (D)
Undecided
Nielson Brothers Polling October 24–28, 2020 479 (LV) ± 4.48% 56% 39% 5%

Results

United States Senate election in South Dakota, 2020[19]
Party Candidate Votes % ±%
Republican Mike Rounds (incumbent) 276,232 65.74% +15.37%
Democratic Daniel Ahlers 143,987 34.26% +4.75%
Total votes 420,219 100.00%
Republican hold

Notes

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

References

  1. Rounds, Johnson gearing up for 2020
  2. Kaczke, Lisa (July 1, 2019). "Scyller Borglum, Republican legislator from Rapid City, announces U.S. Senate candidacy". Argus Leader. Retrieved July 1, 2019.
  3. "2020PrimaryStateCanvassReportandCertificate.pdf" (PDF). South Dakota Secretary of State. Retrieved August 27, 2020.
  4. Inc, Midwest Communications. "Democrat Ahlers to challenge for Senate seat". KELO Newstalk 1320 107.9. Retrieved September 26, 2019.
  5. Kaczke, Lisa (November 9, 2019). "Clara Hart of Sioux Falls announces Democratic candidacy for U.S. Senate". Argus Leader. Retrieved December 6, 2019.
  6. Singiser, Steve. "Here's our ultimate Democratic wishlist for Senate in 2020. Who's on yours?". Daily Kos. Retrieved February 19, 2019.
  7. Levinson, Alexis (March 18, 2015). "Potential Thune Challenger Bows Out". Roll Call. Retrieved October 11, 2018. It’s certainly something that I would consider in the future,
  8. KSFY. "Billie Sutton still plans to serve South Dakota in some capacity". www.ksfy.com. Retrieved September 3, 2019.
  9. "SOUTH DAKOTA". Politics1. Retrieved May 17, 2020.
  10. "2020 Senate Race Ratings for October 29, 2020". The Cook Political Report. Retrieved March 11, 2021.
  11. "2020 Senate Ratings". Senate Ratings. The Rothenberg Political Report. Retrieved March 11, 2021.
  12. "2020 Senate race ratings". Sabato's Crystal Ball. Retrieved March 12, 2021.
  13. "2020 Senate Race Ratings". Daily Kos Elections. Retrieved March 13, 2021.
  14. "2020 Election Forecast". Politico. November 19, 2019.
  15. "Battle for the Senate 2020". RCP. October 23, 2020.
  16. "2020 Senate Elections Model". Decision Desk HQ. September 2, 2020. Retrieved September 2, 2020.
  17. Silver, Nate (September 18, 2020). "Forecasting the race for the Senate". FiveThirtyEight. Retrieved September 18, 2020.
  18. "Forecasting the US elections". The Economist. November 2, 2020. Retrieved March 13, 2021.
  19. "General Election - November 3, 2020" (PDF). Secretary of State of South Dakota. November 10, 2020. Retrieved November 12, 2020.
Official campaign websites
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