VotePredictor
past elections

California House

Andrew Janz (D) vs Devin Nunes (R)

Actual result
R+5.4
Final polls said
R+5.0
1 late poll · ✓
Model predicted
R+10.4
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
1Change ResearchR+5.00.4
2Strategies 360R+6.00.6
3University of California Berkeley Institute of Governmental StudiesR+8.02.6
4VotePredictorR+10.45.0
5SurveyUSAR+14.08.6

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1FiveThirtyEightRep 98%0.000
2The EconomistRep 97%0.001
3Cook PoliticalRep 90%0.010
4Sabato's Crystal BallRep 90%0.010
5DDHQ/Decision DeskRep 87%0.017
6VotePredictorRep 86%0.019

Polls (4)

PollsterDatenPollMiss
Change Research2018-10-20840R+5.00
SurveyUSA2018-09-22582R+14.09
University of California Berkeley Institute of Governmental Studies2018-09-20912R+8.03
Strategies 3602018-09-12402R+6.01