VotePredictor
past elections

California House

Ammar Campa-Najjar (D) vs Darrell Issa (R)

Actual result
R+7.9
Final polls said
R+11.0
1 late poll · ✓
Model predicted
R+6.8
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
1VotePredictorR+6.81.2
2SurveyUSAR+11.03.1
3Strategies 360EVEN7.9

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1The EconomistRep 94%0.003
2FiveThirtyEightRep 95%0.003
3Sabato's Crystal BallRep 90%0.010
4JHK ForecastsRep 84%0.026
5VotePredictorRep 82%0.032
6DDHQ/Decision DeskRep 80%0.039
7Cook PoliticalRep 75%0.062

Polls (3)

PollsterDatenPollMiss
SurveyUSA2020-10-24538R+11.03
Strategies 3602020-10-12401EVEN8
SurveyUSA2020-09-06508R+1.07