VotePredictor
past elections

Illinois House

Bill Foster (D) vs James D. Oberweis (R)

Actual result
D+5.1
Final polls said
D+3.0
3 late polls · ✓
Model predicted
D+2.4
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
1Global Strategy GroupD+4.01.1
2SurveyUSAD+7.01.9
3VotePredictorD+2.42.6
4McLaughlin & AssociatesR+2.07.1

Polls (4)

PollsterDatenPollMiss
SurveyUSA2008-03-03517D+7.02
McLaughlin & Associates2008-03-01550R+2.07
Global Strategy Group2008-02-23402D+4.01
Global Strategy Group2008-02-08525R+2.07