VotePredictor
past elections

Iowa Senate

Michael Franken (D) vs Chuck Grassley (R)

Actual result
R+12.2
Final polls said
R+9.0
5 late polls · ✓
Model predicted
R+12.7
Winner
Rep

"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.R+12.00.2
2VotePredictorR+12.70.5
3CygnalR+11.21.0
4Tarrance GroupR+11.01.2
5Emerson CollegeR+10.71.5
6CiviqsR+8.04.2
7Change ResearchR+3.09.2

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1DDHQ/Decision DeskRep 99%0.000
2The EconomistRep 99%0.000
3Elections DailyRep 99%0.000
4JHK ForecastsRep 99%0.000
5Race to the WHRep 99%0.000
6VotePredictorRep 99%0.000
7FiveThirtyEightRep 97%0.001
8CNalysisRep 90%0.010
9Cook PoliticalRep 90%0.010
10Fox NewsRep 90%0.010
11Inside ElectionsRep 90%0.010
12RealClearPoliticsRep 90%0.010
13Sabato's Crystal BallRep 90%0.010
14Split TicketRep 90%0.010

Polls (9)

PollsterDatenPollMiss
Selzer & Co.2022-11-02801R+12.00
Cygnal2022-10-26600R+11.21
Civiqs2022-10-24623R+8.04
Tarrance Group2022-10-17600R+11.01
Change Research2022-10-161008R+3.09
Selzer & Co.2022-10-11620R+3.09
Emerson College2022-10-03959R+10.71
Cygnal2022-10-03600R+14.42
Change Research2022-09-25978R+5.07