VotePredictor
past elections

North Dakota Senate

Heidi Heitkamp (D) vs Rick Berg (R)

Actual result
D+0.9
Final polls said
EVEN
4 late polls · ✗
Model predicted
R+3.1
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 & StrategyR+2.02.9
2Mellman GroupD+4.03.1
3DFM ResearchD+4.03.1
4VotePredictorR+3.14.0
5Scott Rasmussen (Rasmussen Reports)R+5.05.9

Polls (6)

PollsterDatenPollMiss
Mason-Dixon Polling & Strategy2012-10-27625R+2.03
Mellman Group2012-10-23600D+4.03
Mellman Group2012-10-18600D+3.02
Scott Rasmussen (Rasmussen Reports)2012-10-17600R+5.06
Mason-Dixon Polling & Strategy2012-10-04625EVEN1
DFM Research2012-09-26600D+4.03