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Toss-up · 2004 Senate
Iowa Senate
In the 2004 Iowa Senate race, Chuck Grassley (R) won by about 42 points.
Actual result
R+42.3
Final polls said
R+44.7
3 late polls · ✓
VotePredictor Elections predicted
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Winner
Rep
"Final polls said" averages polls from the last ~3 weeks — the call right before the vote, and how pollsters are rated. VotePredictor Elections' prediction is walk-forward (trained only on earlier races).
Final rankings
How everyone who called this race did, ranked — VotePredictor Elections shown inline (★).
Pollsters — each pollster's final poll vs the result
| # | Pollster | Final call | Miss | Called |
|---|---|---|---|---|
| 1 | Zogby Analytics | R+46.0 | 3.7 | ✓ |
| 2 | Opinion Dynamics | R+47.0 | 4.7 | ✓ |
The polls behind it
4 polls · newest firstPollsterDateSampleMiss
Zogby Analytics2004-10-304
Opinion Dynamics2004-10-305
Zogby Analytics2004-10-261
Opinion Dynamics2004-09-212
Frequently asked questions
Who won the 2004 Iowa Senate race?
Chuck Grassley (R) won, by about 42.3 points (R+42.3).
When was the 2004 Iowa Senate election held?
It was held in November 2004.
Which party matches you?
These candidates split on taxes, health care, guns, and abortion. See where you land — and which members of Congress actually vote like you.