VotePredictor
past elections

Massachusetts President

Joe Biden (D) vs Bernard Sanders (R)

Actual result
D+33.5
Final polls said
D+36.3
3 late polls · ✓
Model predicted
D+35.3
Winner
Dem

"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
1MassINC Polling GroupD+34.00.5
2YouGovD+35.01.5
3VotePredictorD+35.31.8
4SurveyMonkeyD+40.06.5

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1CNalysisDem 99%0.000
2Cook PoliticalDem 99%0.000
3DDHQ/Decision DeskDem 100%0.000
4The EconomistDem 100%0.000
5Elections DailyDem 99%0.000
6FiveThirtyEightDem 100%0.000
7Inside ElectionsDem 99%0.000
8JHK ForecastsDem 100%0.000
9Princeton Election ConsortiumDem 100%0.000
10Race to the WHDem 100%0.000
11RealClearPoliticsDem 99%0.000
12Sabato's Crystal BallDem 99%0.000
13VotePredictorDem 100%0.000

Polls (4)

PollsterDatenPollMiss
MassINC Polling Group2020-10-27929D+34.01
SurveyMonkey2020-10-263653D+40.07
YouGov2020-10-18713D+35.02
SurveyMonkey2020-10-064600D+40.07