VotePredictor
past elections

South Carolina Senate

Jaime Harrison (D) vs Lindsey Graham (R)

Actual result
R+10.3
Final polls said
R+2.3
8 late polls · ✓
Model predicted
R+6.6
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
1Øptimus AnalyticsR+9.80.5
2Starboard CommunicationsR+9.40.9
3VotePredictorR+6.63.6
4The New York Times/Siena CollegeR+6.04.3
5Data for ProgressR+3.07.3
6Morning ConsultR+2.28.1
7East Carolina University Center for Survey ResearchR+1.88.4
8YouGovR+1.09.3
9Impact ResearchEVEN10.3
10Quinnipiac UniversityEVEN10.3
11GBAOD+1.011.3
12brilliant corners Research & StrategiesD+2.012.3
13SwayableD+5.916.2

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1Elections DailyRep 90%0.010
2VotePredictorRep 85%0.021
3JHK ForecastsRep 81%0.036
4FiveThirtyEightRep 77%0.053
5Sabato's Crystal BallRep 75%0.062
6Princeton Election ConsortiumRep 74%0.068
7Race to the WHRep 74%0.068
8The EconomistRep 69%0.096
9DDHQ/Decision DeskRep 65%0.122
10CNalysisRep 60%0.160
11Inside ElectionsRep 60%0.160
12Cook PoliticalDem 50%0.250
13RealClearPoliticsDem 50%0.250

Polls (19)

PollsterDatenPollMiss
Øptimus Analytics2020-11-01802R+9.80
Data for Progress2020-10-29880R+3.07
Swayable2020-10-27416D+5.916
Morning Consult2020-10-26904R+2.28
Starboard Communications2020-10-26800R+9.41
East Carolina University Center for Survey Research2020-10-24763R+1.88
Data for Progress2020-10-241196EVEN10
Morning Consult2020-10-15926D+2.012
brilliant corners Research & Strategies2020-10-13525D+2.012
The New York Times/Siena College2020-10-11605R+6.04
Data for Progress2020-10-10801D+1.011
Impact Research2020-10-021011EVEN10
GBAO2020-09-26800D+1.011
Data for Progress2020-09-25824R+1.09
Quinnipiac University2020-09-251123EVEN10
YouGov2020-09-241080R+1.09
brilliant corners Research & Strategies2020-09-23608D+2.012
Morning Consult2020-09-15764R+1.09
Quinnipiac University2020-09-12969EVEN10