2020 United States Senate election in South Dakota

Last updated

2020 United States Senate election in South Dakota
Flag of South Dakota.svg
  2014 November 3, 2020 2026  
  Mike Rounds official Senate portrait (cropped).jpg No image.svg
Nominee Mike Rounds Dan Ahlers
Party Republican Democratic
Popular vote276,232143,987
Percentage65.74%34.26%

2020 United States Senate election in South Dakota results map by county.svg
SD Senate 2020.svg
Rounds:     50–60%     60–70%     70–80%     80–90%     >90%
Ahlers:     50–60%     60–70%     70–80%     80–90%     >90%

U.S. senator before election

Mike Rounds
Republican

Elected U.S. Senator

Mike Rounds
Republican

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.

Contents

Republican primary

Candidates

Nominee

Eliminated in primary

Results

Results by county:
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Rounds
50-60%
60-70%
70-80%
80-90%
Borglum
50-60% South Dakota Senate Republican primary, 2020.svg
Results by county:
  Rounds
  •   50–60%
  •   60–70%
  •   70–80%
  •   80–90%
  Borglum
  •   50–60%
Republican primary results [3]
PartyCandidateVotes%
Republican Mike Rounds (incumbent) 70,365 75.23%
Republican Scyller Borglum 23,16424.77%
Total votes93,529 100.00%

Democratic primary

Candidates

Nominee

Did not qualify

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

Declined

Independents

Candidates

Withdrew

General election

Predictions

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

Polling

Poll sourceDate(s)
administered
Sample
size [a]
Margin
of error
Mike
Rounds (R)
Dan
Ahlers (D)
Undecided
Nielson Brothers Polling [19] October 24–28, 2020479 (LV)± 4.48%56%39%5%

Results

United States Senate election in South Dakota, 2020 [20]
PartyCandidateVotes%±%
Republican Mike Rounds (incumbent) 276,232 65.74% +15.37%
Democratic Daniel Ahlers 143,98734.26%+4.75%
Total votes420,219 100.00%
Republican hold

By county

By county
County Mike Rounds
Republican
Daniel Ahlers
Democratic
MarginTotal
votes
#%#%#%
Aurora 1,00271.3240328.6859942.631,405
Beadle 5,10471.991,98628.013,11843.987,090
Bennett 72962.5243737.4829225.041,166
Bon Homme 2,15672.1183427.891,32244.212,990
Brookings 8,79260.485,74639.523,04620.9514,538
Brown 11,16864.006,28336.004,88527.9917,451
Brule 1,73569.6575630.3597939.302,491
Buffalo 22340.9232259.08-99-18.16545
Butte 3,80979.8596120.152,84859.714,770
Campbell 74585.9312214.0762371.86867
Charles Mix 2,54266.881,25933.121,28333.753,801
Clark 1,39775.6445024.3694751.271,847
Clay 2,85750.442,80749.56500.885,664
Codington 9,47972.333,62627.675,85344.6613,105
Corson 68153.8858346.12987.751,264
Custer 3,97372.821,48327.182,49045.645,456
Davison 5,89369.882,54030.123,35339.768,433
Day 1,89563.931,06936.0782627.872,964
Deuel 1,71473.1862826.811,08646.372,342
Dewey 88445.431,06254.57-178-9.151,946
Douglas 1,46986.2123513.791,23472.421,704
Edmunds 1,53977.4544822.551,09154.911,987
Fall River 3,00975.1999324.812,01650.374,002
Faulk 97582.0721317.9376264.141,188
Grant 2,72372.631,02627.371,69745.263,749
Gregory 1,76678.3548821.651,27856.702,254
Haakon 1,03290.691069.3192681.371,138
Hamlin 2,41378.6065721.401,75657.203,070
Hand 1,48079.6637820.341,10259.311,858
Hanson 1,79676.1056423.901,23252.202,360
Harding 72790.87739.1365481.75800
Hughes 6,21770.952,54629.053,67141.898,763
Hutchinson 2,98279.4477220.562,21058.873,754
Hyde 56879.8914320.1142559.78711
Jackson 75667.9235732.0839935.851,113
Jerauld 72072.2227727.7844344.43997
Jones 49783.399916.6139866.78596
Kingsbury 1,97070.8980929.111,16141.782,779
Lake 3,81664.842,06935.161,74729.695,885
Lawrence 9,38568.294,35831.715,02736.5813,743
Lincoln 21,22165.8311,01334.1710,20831.6732,234
Lyman 1,06666.6753333.3353333.331,599
Marshall 1,33461.0085339.0048122.002,187
McCook 2,07271.2883528.721,23742.552,907
McPherson 1,08682.2123517.7985164.421,321
Meade 10,35576.533,17623.477,17953.0613,531
Mellette 46860.7030339.3016521.40771
Miner 80770.4233929.5846840.841,146
Minnehaha 52,77357.6338,79942.3713,97415.2691,572
Moody 1,87758.291,34341.7153416.583,220
Oglala Lakota 51015.932,69184.07-2,181-68.143,201
Pennington 37,69466.2719,18433.7318,51032.5456,878
Perkins 1,39584.8524915.151,14669.711,644
Potter 1,16083.8222416.1893667.631,384
Roberts 2,52958.871,76741.1376217.744,296
Sanborn 89876.1728123.8361752.331,179
Spink 2,17868.8498631.161,19237.673,164
Stanley 1,27477.1237822.8889654.241,652
Sully 75981.8816818.1259163.75927
Todd 70628.221,79671.78-1,090-43.562,502
Tripp 2,18881.3450218.661,68662.682,690
Turner 3,41675.211,12624.792,29050.424,542
Union 6,36472.562,40727.443,95745.128,771
Walworth 2,04079.5352520.471,51559.062,565
Yankton 6,99464.513,84835.493,14629.0210,842
Ziebach 45049.5645850.44-8-0.88908
Totals276,23265.74143,98734.26132,24531.47420,219

Counties that flipped from Democratic to Republican

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. Archived from the original (PDF) on September 13, 2020. Retrieved August 27, 2020.
  4. "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. 1 2 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 . Archived from the original on March 21, 2015. Retrieved October 11, 2018. It's certainly something that I would consider in the future,
  8. KSFY (November 7, 2018). "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 . Archived from the original on September 18, 2020. Retrieved September 18, 2020.
  18. "Forecasting the US elections". The Economist. November 2, 2020. Retrieved March 13, 2021.
  19. Nielson Brothers Polling
  20. "General Election - November 3, 2020" (PDF). Secretary of State of South Dakota . November 10, 2020. Archived from the original (PDF) on December 18, 2020. Retrieved November 12, 2020.

Official campaign websites