Big Ten
Historical accuracy is measured against certified results. Current-cycle records come from the canonical, deduplicated archive and do not by themselves change the sealed forecast.
- Historical polls
- 10
- Mean absolute error
- 4.69percentage points
- Historical bias
- D+1.93
- Represented cycles
- 12008
- Current archive
- 0canonical records
- History span
- Oct 21, 2008through Oct 21, 2008
Known names and relationships
- Known aliases
- No additional reviewed aliases
- Organization type
- Single canonical organization
- Cycles represented
- 2008
All 10 eligible historical polls come from one cycle, so this record does not yet describe performance across elections.
Current-cycle records
Archive source date 2026-09-09 · bundled copy. Archive records may be newer than the sealed forecast; inclusion here does not mean the forecast uses them.
0 shown · 0 total
No record in the currently authorized canonical archive is attached to this identity.
This is not evidence that the pollster released no 2026 polling; the source-audit gaps remain documented.
Eligible historical observations
10 shown · 10 total
| Cycle | Race | Type | Field end | Sample | Poll | Result | Error |
|---|---|---|---|---|---|---|---|
| 2008 | 2008_Sen-G_MN | Sen-G | 2008-10-21 | 583 | D+6.0 | D+0.0 | D+6.0 |
| 2008 | 2008_Pres-G_WI | Pres-G | 2008-10-21 | 584 | D+12.0 | D+13.9 | R+1.9 |
| 2008 | 2008_Pres-G_US | Pres-G | 2008-10-21 | 1,014 | D+9.0 | D+7.3 | D+1.7 |
| 2008 | 2008_Pres-G_PA | Pres-G | 2008-10-21 | 566 | D+10.0 | D+10.3 | R+0.3 |
| 2008 | 2008_Pres-G_OH | Pres-G | 2008-10-21 | 564 | D+12.0 | D+4.6 | D+7.4 |
| 2008 | 2008_Pres-G_MN | Pres-G | 2008-10-21 | 583 | D+19.0 | D+10.3 | D+8.7 |
| 2008 | 2008_Pres-G_MI | Pres-G | 2008-10-21 | 562 | D+22.0 | D+16.5 | D+5.5 |
| 2008 | 2008_Pres-G_IN | Pres-G | 2008-10-21 | 586 | D+9.0 | D+1.0 | D+8.0 |
| 2008 | 2008_Pres-G_IL | Pres-G | 2008-10-21 | 586 | D+29.0 | D+25.1 | D+3.9 |
| 2008 | 2008_Pres-G_IA | Pres-G | 2008-10-21 | 586 | D+13.0 | D+9.6 | D+3.4 |
Method · historical final-three-week D/R general-election rows plus verified historical supplement; min n=5
Definition · bias_D is poll D-R margin minus actual D-R margin; positive overstates Democrats.
A missing sample, sponsor or source is labeled unavailable; it is never reconstructed.
Poll data via VoteHub, used under CC BY 4.0. Poll data from The New York Times, used under CC BY 4.0.