VotePredictor
past elections

Iowa House

Leonard L. Boswell (D) vs Brad Zaun (R)

Actual result
D+4.3
Final polls said
D+12.0
1 late poll · ✓
Model predicted
D+8.8
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
1Normington, Petts & AssociatesD+8.03.8
2VotePredictorD+8.84.5
3Impact ResearchD+9.04.8
4PSB ResearchD+12.07.8

Polls (3)

PollsterDatenPollMiss
PSB Research2010-10-20404D+12.08
Impact Research2010-10-04500D+9.05
Normington, Petts & Associates2010-10-03400D+8.04