VotePredictor
past elections

Iowa House

Dave Loebsack (D) vs Christopher Peters (R)

Actual result
D+12.2
Final polls said
D+12.9
1 late poll · ✓
Model predicted
D+11.9
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
1VotePredictorD+11.90.3
2Emerson CollegeD+12.90.7
3Gravis MarketingD+6.06.2

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1Cook PoliticalDem 99%0.000
2The EconomistDem 98%0.000
3FiveThirtyEightDem 99%0.000
4Sabato's Crystal BallDem 99%0.000
5VotePredictorDem 97%0.001
6DDHQ/Decision DeskDem 96%0.002

Polls (3)

PollsterDatenPollMiss
Emerson College2018-10-31373D+12.91
Gravis Marketing2018-09-10425D+6.06
Emerson College2018-09-07250D+24.713