VotePredictor
past elections

Iowa Governor

Jack G. Hatch (D) vs Terry E. Branstad (R)

Actual result
R+21.7
Final polls said
R+18.0
13 late polls · ✓
Model predicted
R+16.3
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
1Monmouth University Polling InstituteR+21.00.7
2Loras College Public Opinion Survey CenterR+20.80.9
3IpsosR+23.01.3
4Marist CollegeR+23.01.3
5Selzer & Co.R+24.02.3
6Rasmussen ReportsR+18.03.7
7Beacon Research/Shaw & Co. ResearchR+17.04.7
8Suffolk UniversityR+17.04.7
9VotePredictorR+16.35.5
10Magellan StrategiesR+16.05.7
11YouGovR+15.06.7
12Public Policy PollingR+11.010.7
13Quinnipiac UniversityR+11.010.7
14Gravis MarketingR+8.013.7

Polls (24)

PollsterDatenPollMiss
Public Policy Polling2014-11-021265R+11.011
Quinnipiac University2014-10-30778R+11.011
Selzer & Co.2014-10-30701R+24.02
Rasmussen Reports2014-10-29990R+18.04
Beacon Research/Shaw & Co. Research2014-10-29911R+17.05
YouGov2014-10-281112R+15.07
Ipsos2014-10-261129R+23.01
Quinnipiac University2014-10-24817R+19.03
Loras College Public Opinion Survey Center2014-10-231121R+20.81
Monmouth University Polling Institute2014-10-20423R+21.01
Marist College2014-10-20772R+23.01
YouGov2014-10-202322R+13.09
Quinnipiac University2014-10-18964R+18.04
Suffolk University2014-10-13500R+17.05
Quinnipiac University2014-10-10967R+15.07
Magellan Strategies2014-10-031299R+16.06
Gravis Marketing2014-09-29522R+8.014
Marist College2014-09-29778R+22.00
Public Policy Polling2014-09-271192R+14.08
YouGov2014-09-262359R+13.09
Selzer & Co.2014-09-23546R+14.08
Rasmussen Reports2014-09-17750R+6.016
Beacon Research/Shaw & Co. Research2014-09-15600R+13.09
Quinnipiac University2014-09-121167R+23.01