VotePredictor
past elections

Washington Senate

Patty Murray (D) vs Chris Vance (R)

Actual result
D+18.0
Final polls said
D+19.8
5 late polls · ✓
Model predicted
D+18.3
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
1VotePredictorD+18.30.2
2LegerD+16.02.0
3YouGovD+16.02.0
4SurveyMonkeyD+22.04.0
5Elway ResearchD+24.06.0
6SurveyUSAD+12.06.0
7Emerson CollegeD+6.411.6

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1Cook PoliticalDem 99%0.000
2FiveThirtyEightDem 99%0.000
3Inside ElectionsDem 99%0.000
4Sabato's Crystal BallDem 99%0.000
5VotePredictorDem 100%0.000

Polls (8)

PollsterDatenPollMiss
Leger2016-11-05402D+16.02
SurveyMonkey2016-11-041451D+22.04
SurveyUSA2016-11-01667D+12.06
SurveyMonkey2016-10-28745D+25.07
Elway Research2016-10-21502D+24.06
YouGov2016-10-10750D+16.02
Emerson College2016-09-26700D+6.412
Leger2016-09-13505D+21.03