VotePredictor
past elections

California House

Jim Costa (D) vs Michael Maher (R)

Actual result
D+8.4
Final polls said
D+0.4
1 late poll · ✓
Model predicted
R+2.7
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
1Trafalgar GroupD+0.48.0
2VotePredictorR+2.711.0

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1CNalysisDem 99%0.000
2Cook PoliticalDem 99%0.000
3DDHQ/Decision DeskDem 99%0.000
4Elections DailyDem 99%0.000
5Inside ElectionsDem 99%0.000
6JHK ForecastsDem 100%0.000
7Race to the WHDem 98%0.000
8Sabato's Crystal BallDem 99%0.000
9The EconomistDem 96%0.002
10FiveThirtyEightDem 96%0.002
11Fox NewsDem 90%0.010
12RealClearPoliticsDem 90%0.010
13Split TicketDem 90%0.010
14VotePredictorDem 83%0.028

Polls (1)

PollsterDatenPollMiss
Trafalgar Group2022-10-02515D+0.48