VotePredictor
past elections

Delaware Senate

Christopher A. Coons (D) vs Christine O'Donnell (R)

Actual result
D+16.6
Final polls said
D+15.5
2 late polls · ✓
Model predicted
D+16.3
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
1VotePredictorD+16.30.3
2ccAdvertisingD+15.31.3
3Magellan StrategiesD+18.01.4
4Big VillageD+19.02.4
5University of Delaware Center for Political CommunicationD+19.02.4
6Fairleigh Dickinson UniversityD+21.04.4
7SurveyUSAD+21.04.4
8Scott Rasmussen (Rasmussen Reports)D+11.05.6
9Monmouth University Polling InstituteD+10.06.6

Polls (13)

PollsterDatenPollMiss
Monmouth University Polling Institute2010-10-261171D+10.07
Fairleigh Dickinson University2010-10-23797D+21.04
Scott Rasmussen (Rasmussen Reports)2010-10-14500D+11.06
SurveyUSA2010-10-112355D+21.04
Magellan Strategies2010-10-10928D+18.01
Monmouth University Polling Institute2010-10-10790D+19.02
Big Village2010-10-10834D+19.02
Scott Rasmussen (Rasmussen Reports)2010-10-091000D+16.01
Fairleigh Dickinson University2010-09-30801D+17.00
Scott Rasmussen (Rasmussen Reports)2010-09-26500D+9.08
University of Delaware Center for Political Communication2010-09-23729D+19.02
ccAdvertising2010-09-20679D+15.31
Scott Rasmussen (Rasmussen Reports)2010-09-15500D+11.06