VotePredictor
past elections

Michigan Senate

Gary C. Peters (D) vs John James (R)

Actual result
D+1.7
Final polls said
D+7.4
31 late polls · ✓
Model predicted
D+8.3
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
1Marketing Resource Group (MRG)D+2.00.3
2Tarrance GroupD+1.30.4
3YouGovD+3.01.3
4Citizen DataD+3.51.9
5Change ResearchD+5.03.3
6EPIC-MRAD+5.03.3
7Data for ProgressD+5.03.3
8Marist CollegeD+5.03.3
9Mitchell Research & CommunicationsD+5.43.7
10Trafalgar GroupR+2.23.9
11Morning ConsultD+5.74.0
12Emerson CollegeD+5.84.1
13Baldwin Wallace University Community Research InstituteD+5.94.2
14ABC News/The Washington PostD+6.04.3
15IpsosD+7.05.3
16Harris Insights & AnalyticsD+7.05.3
17SwayableD+7.25.5
18The New York Times/Siena CollegeD+8.06.3
19Beacon Research/Shaw & Co. ResearchD+8.06.3
20National ResearchD+8.06.3
21Garin-Hart-Yang Research GroupD+8.06.3
22VotePredictorD+8.36.6
23RMG ResearchD+9.07.3
24Glengariff GroupD+9.67.9
25Public Policy PollingD+10.08.3
26Targoz Market ResearchD+11.09.3
27Gravis MarketingD+11.09.3
28SSRSD+12.010.3
29Kiaer ResearchD+12.811.1
30Research Co.D+15.013.3
31Redfield & Wilton StrategiesD+16.014.3

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1The EconomistDem 97%0.001
2Princeton Election ConsortiumDem 96%0.002
3JHK ForecastsDem 94%0.004
4VotePredictorDem 93%0.005
5Race to the WHDem 91%0.008
6DDHQ/Decision DeskDem 86%0.020
7FiveThirtyEightDem 83%0.029
8CNalysisDem 75%0.062
9Cook PoliticalDem 75%0.062
10Elections DailyDem 75%0.062
11Inside ElectionsDem 75%0.062
12Sabato's Crystal BallDem 75%0.062
13RealClearPoliticsDem 50%0.250

Polls (58)

PollsterDatenPollMiss
Change Research2020-10-31383D+5.03
Research Co.2020-10-31450D+15.013
Emerson College2020-10-30700D+5.84
Public Policy Polling2020-10-29745D+10.08
Mitchell Research & Communications2020-10-29817D+5.44
Swayable2020-10-29393D+7.26
Ipsos2020-10-29654D+7.05
RMG Research2020-10-28800D+9.07
Targoz Market Research2020-10-27993D+11.09
SSRS2020-10-27907D+12.010
EPIC-MRA2020-10-27600D+5.03
Morning Consult2020-10-261736D+5.74
Mitchell Research & Communications2020-10-26759D+9.68
The New York Times/Siena College2020-10-25856D+8.06
Kiaer Research2020-10-25669D+12.811
Swayable2020-10-25365D+16.815
Tarrance Group2020-10-25679D+1.30
Gravis Marketing2020-10-24679D+11.09
Glengariff Group2020-10-24600D+9.68
Ipsos2020-10-23652D+6.04
ABC News/The Washington Post2020-10-22789D+6.04
Public Policy Polling2020-10-21804D+9.07
Citizen Data2020-10-191000D+3.52
Beacon Research/Shaw & Co. Research2020-10-191032D+8.06
Change Research2020-10-18718D+5.03
Mitchell Research & Communications2020-10-18900D+6.04
Trafalgar Group2020-10-171034R+2.24
Data for Progress2020-10-17830D+5.03
EPIC-MRA2020-10-17600D+6.04
Ipsos2020-10-17686D+5.03
Morning Consult2020-10-151717D+6.04
Harris Insights & Analytics2020-10-141289D+7.05
Trafalgar Group2020-10-131018R+1.43
Ipsos2020-10-10620D+8.06
EPIC-MRA2020-10-10600D+6.04
YouGov2020-10-081181D+3.01
The New York Times/Siena College2020-10-08614D+1.01
Emerson College2020-10-06716D+9.68
National Research2020-10-05800D+8.06
Baldwin Wallace University Community Research Institute2020-10-041134D+5.94
Tarrance Group2020-10-04601D+2.00
Change Research2020-10-03676D+8.06
Ipsos2020-10-03709D+7.05
Glengariff Group2020-10-02600D+5.44
Public Policy Polling2020-09-30746D+7.05
Trafalgar Group2020-09-271042D+1.40
Trafalgar Group2020-09-241047R+0.12
Marist College2020-09-21799D+5.03
Change Research2020-09-19568D+6.04
Garin-Hart-Yang Research Group2020-09-18400D+8.06
Data for Progress2020-09-16455D+5.03
Marketing Resource Group (MRG)2020-09-16600D+2.00
Baldwin Wallace University Community Research Institute2020-09-151001D+4.23
Morning Consult2020-09-151376D+7.05
Redfield & Wilton Strategies2020-09-13930D+16.014
Ipsos2020-09-13637D+6.04
EPIC-MRA2020-09-12600D+4.02
Change Research2020-09-05876D+4.02