VotePredictor
past elections

Pennsylvania Senate

Robert P. Casey Jr. (D) vs Rick Santorum (R)

Actual result
D+17.4
Final polls said
D+11.8
14 late polls · ✓
Model predicted
D+8.5
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
1GQRD+17.00.4
2YouGovD+16.01.4
3Temple University Institute for Survey ResearchD+16.01.4
4The Polling Company Inc.D+16.01.4
5Franklin & Marshall College Center for Opinion ResearchD+15.02.4
6Pew Research CenterD+21.03.6
7Mason-Dixon Polling & StrategyD+13.04.4
8Scott Rasmussen (Rasmussen Reports)D+13.04.4
9West Chester UniversityD+11.06.4
10Quinnipiac UniversityD+10.07.4
11VotePredictorD+8.58.8
12Muhlenberg College Institute of Public OpinionD+8.09.4
13Zogby AnalyticsD+8.09.4
14Victory ResearchD+4.013.4

Polls (27)

PollsterDatenPollMiss
Victory Research2006-11-04800D+4.013
Mason-Dixon Polling & Strategy2006-11-01625D+13.04
YouGov2006-10-311005D+16.01
Muhlenberg College Institute of Public Opinion2006-10-31507D+8.09
Scott Rasmussen (Rasmussen Reports)2006-10-28500D+13.04
Franklin & Marshall College Center for Opinion Research2006-10-27626D+15.02
Zogby Analytics2006-10-27600D+8.09
Quinnipiac University2006-10-26933D+10.07
Zogby Analytics2006-10-25755D+8.98
West Chester University2006-10-24601D+11.06
Mason-Dixon Polling & Strategy2006-10-20625D+12.05
Temple University Institute for Survey Research2006-10-20698D+16.01
GQR2006-10-16600D+17.00
Scott Rasmussen (Rasmussen Reports)2006-10-15500D+13.04
Zogby Analytics2006-10-13679D+8.19
Scott Rasmussen (Rasmussen Reports)2006-10-06500D+13.04
Muhlenberg College Institute of Public Opinion2006-10-05511D+5.012
Zogby Analytics2006-09-29600D+12.05
The Polling Company Inc.2006-09-27679D+16.01
Mason-Dixon Polling & Strategy2006-09-24625D+9.08
Zogby Analytics2006-09-22679D+6.011
Quinnipiac University2006-09-21933D+14.03
Scott Rasmussen (Rasmussen Reports)2006-09-20500D+10.07
GQR2006-09-18414D+14.03
Temple University Institute for Survey Research2006-09-17666D+10.07
Pew Research Center2006-09-151201D+21.04
Franklin & Marshall College Center for Opinion Research2006-09-15604D+7.010