VotePredictor
past elections

South Dakota President

Joe Biden (D) vs Donald Trump (R)

Actual result
R+26.2
Final polls said
R+17.7
3 late polls · ✓
Model predicted
R+22.2
Winner
Rep

"Final polls said" averages polls from the last ~3 weeks — the call right before the vote, and how pollsters are rated. The model's prediction is walk-forward (trained only on earlier races).

Final rankings

How everyone who called this race did, ranked — VotePredictor shown inline (★).

Pollsters — each pollster's final poll vs the result

#PollsterFinal callMissCalled
1SurveyMonkeyR+27.00.8
2VotePredictorR+22.23.9
3Nielson Brothers PollingR+15.011.2
4Mason-Dixon Polling & StrategyR+11.015.2

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1CNalysisRep 99%0.000
2Cook PoliticalRep 99%0.000
3DDHQ/Decision DeskRep 98%0.000
4The EconomistRep 100%0.000
5Elections DailyRep 99%0.000
6Inside ElectionsRep 99%0.000
7JHK ForecastsRep 100%0.000
8Race to the WHRep 99%0.000
9RealClearPoliticsRep 99%0.000
10Sabato's Crystal BallRep 99%0.000
11VotePredictorRep 100%0.000
12Princeton Election ConsortiumRep 96%0.002
13FiveThirtyEightRep 95%0.003

Polls (4)

PollsterDatenPollMiss
Nielson Brothers Polling2020-10-26484R+15.011
SurveyMonkey2020-10-26606R+27.01
Mason-Dixon Polling & Strategy2020-10-20625R+11.015
SurveyMonkey2020-10-06817R+8.018