VotePredictor
past elections

California House

Josh Harder (D) vs Jeff Denham (R)

Actual result
D+4.5
Final polls said
D+2.4
1 late poll · ✓
Model predicted
R+1.0
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
1University of California Berkeley Institute of Governmental StudiesD+5.00.5
2The New York Times/Siena CollegeD+2.42.1
3VotePredictorR+1.05.5

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1Sabato's Crystal BallDem 75%0.062
2FiveThirtyEightDem 74%0.068
3The EconomistDem 67%0.107
4DDHQ/Decision DeskDem 62%0.145
5Cook PoliticalDem 50%0.250
6VotePredictorRep 64%0.413

Polls (2)

PollsterDatenPollMiss
The New York Times/Siena College2018-10-23501D+2.42
University of California Berkeley Institute of Governmental Studies2018-09-20726D+5.01