VotePredictor
past elections

Iowa Senate

Tom Harkin (D) vs Greg Ganske (R)

Actual result
D+10.4
Final polls said
D+17.5
4 late polls · ✓
Model predicted
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
1Selzer & Co.D+9.01.4
2Public Opinion StrategiesD+4.06.4
3Gazette CommunicationsD+22.011.6
4SurveyUSAD+22.011.6

Polls (7)

PollsterDatenPollMiss
Selzer & Co.2002-10-31807D+9.01
Gazette Communications2002-10-291082D+22.012
SurveyUSA2002-10-28605D+22.012
SurveyUSA2002-10-21605D+17.07
SurveyUSA2002-10-07679D+9.01
Selzer & Co.2002-09-23807D+20.010
Public Opinion Strategies2002-09-18400D+4.06