VotePredictor
past elections

South Dakota House

Stephanie Herseth Sandlin (D) vs Larry Diedrich (R)

Actual result
D+7.5
Final polls said
D+0.6
2 late polls · ✓
Model predicted
D+2.9
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
1Mason-Dixon Polling & StrategyD+4.03.5
2Scott Rasmussen (Rasmussen Reports)D+3.04.5
3VotePredictorD+2.94.6
4Zogby AnalyticsR+2.810.3

Polls (7)

PollsterDatenPollMiss
Zogby Analytics2004-10-25800R+2.810
Mason-Dixon Polling & Strategy2004-10-20800D+4.03
Zogby Analytics2004-09-26500D+8.51
Mason-Dixon Polling & Strategy2004-09-21800D+7.00
Scott Rasmussen (Rasmussen Reports)2004-09-08500D+3.04
Zogby Analytics2004-05-19503D+11.010
Mason-Dixon Polling & Strategy2004-05-11625D+9.08