VotePredictor
past elections

Washington Senate

Maria Cantwell (D) vs Susan Hutchison (R)

Actual result
D+16.9
Final polls said
D+14.0
1 late poll · ✓
Model predicted
D+14.7
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+14.72.2
2Elway ResearchD+14.02.9

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1Cook PoliticalDem 99%0.000
2DDHQ/Decision DeskDem 98%0.000
3FiveThirtyEightDem 100%0.000
4JHK ForecastsDem 100%0.000
5Sabato's Crystal BallDem 99%0.000
6Inside ElectionsDem 99%0.000
7VotePredictorDem 100%0.000

Polls (1)

PollsterDatenPollMiss
Elway Research2018-10-06405D+14.03