VotePredictor
past elections

Arizona Senate

Kyrsten Sinema (D) vs Martha McSally (R)

Actual result
D+2.3
Final polls said
D+0.2
19 late polls · ✓
Model predicted
R+1.9
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
1Marist CollegeD+3.00.7
2YouGovD+3.00.7
3Suffolk UniversityD+3.00.7
4Research Co.D+1.01.3
5Emerson CollegeD+0.71.6
6Vox Populi PollingD+4.01.7
7SSRSD+4.01.7
8Change ResearchD+0.22.1
9Harris Insights & AnalyticsD+4.62.3
10Beacon Research/Shaw & Co. ResearchEVEN2.3
11TargetSmartD+5.02.7
12Noble Predictive InsightsR+1.03.3
13Gravis MarketingR+1.03.3
14HighGround Inc.R+1.23.5
15Latino DecisionsD+6.03.7
16The New York Times/Siena CollegeR+1.84.1
17VotePredictorR+1.94.3
18IpsosR+2.04.3
19Trafalgar GroupR+2.14.4
20Data OrbitalD+8.25.8

Forecasters — pre-election win probability, scored by Brier

#ForecasterWin probBrierCalled
1Sabato's Crystal BallDem 75%0.062
2FiveThirtyEightDem 67%0.109
3VotePredictorDem 61%0.151
4Inside ElectionsDem 60%0.160
5JHK ForecastsDem 59%0.168
6DDHQ/Decision DeskDem 57%0.184
7Cook PoliticalDem 50%0.250

Polls (32)

PollsterDatenPollMiss
Trafalgar Group2018-11-041217R+2.14
Harris Insights & Analytics2018-11-04600D+4.62
Research Co.2018-11-02450D+1.01
Emerson College2018-11-02758D+0.72
Noble Predictive Insights2018-11-02631R+1.03
Harris Insights & Analytics2018-11-01600R+5.68
Trafalgar Group2018-10-312166D+2.70
Vox Populi Polling2018-10-29677D+4.02
Gravis Marketing2018-10-281165R+1.03
Beacon Research/Shaw & Co. Research2018-10-28643EVEN2
HighGround Inc.2018-10-27400R+1.24
Harris Insights & Analytics2018-10-271400R+4.87
SSRS2018-10-26702D+4.02
Marist College2018-10-25506D+3.01
YouGov2018-10-25972D+3.01
Noble Predictive Insights2018-10-22600R+7.09
Ipsos2018-10-21799R+2.04
The New York Times/Siena College2018-10-17606R+1.84
Data Orbital2018-10-16600D+8.26
Change Research2018-10-09783D+0.22
YouGov2018-10-04898D+3.01
Beacon Research/Shaw & Co. Research2018-10-01716D+2.00
Noble Predictive Insights2018-10-01600R+6.08
Vox Populi Polling2018-09-30702R+3.05
Suffolk University2018-09-29500D+3.01
Emerson College2018-09-20650D+5.53
Latino Decisions2018-09-18463D+6.04
Marist College2018-09-18564D+2.00
SSRS2018-09-13761D+7.05
TargetSmart2018-09-10800D+5.03
Beacon Research/Shaw & Co. Research2018-09-10710D+3.01
Ipsos2018-09-091016D+2.60