VotePredictor
past elections

Illinois House

Sean Casten (D) vs Jeanne M. Ives (R)

Actual result
D+7.4
Final polls said
D+14.2
1 late poll · ✓
Model predicted
D+15.8
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
1Victory ResearchD+14.26.8
2VotePredictorD+15.88.4

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1Cook PoliticalDem 99%0.000
2The EconomistDem 98%0.000
3Sabato's Crystal BallDem 99%0.000
4VotePredictorDem 99%0.000
5JHK ForecastsDem 96%0.002
6FiveThirtyEightDem 87%0.017
7DDHQ/Decision DeskDem 67%0.106

Polls (1)

PollsterDatenPollMiss
Victory Research2020-10-31600D+14.27