Research 2000
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
- 248
- Mean absolute error
- 5.16percentage points
- Historical bias
- D+1.43
- Represented cycles
- 92000–2010
- Current archive
- 0canonical records
- History span
- Oct 17, 2000through Jan 16, 2010
Known names and relationships
- Known aliases
- No additional reviewed aliases
- Organization type
- Single canonical organization
- Cycles represented
- 2000 · 2002 · 2004 · 2005 · 2006 · 2007 · 2008 · 2009 · 2010
248 eligible historical polls across 9 represented cycles passed the published history identity checks. Historical bias is descriptive and is kept separate from sponsor or client affiliation.
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
50 shown · 248 total
| Cycle | Race | Type | Field end | Sample | Poll | Result | Error |
|---|---|---|---|---|---|---|---|
| 2008 | 2008_Pres-G_IN | Pres-G | 2008-10-26 | 800 | 0 | D+1.0 | R+1.0 |
| 2008 | 2008_House-G_IN-9 | House-G | 2008-10-26 | 400 | D+13.0 | D+19.4 | R+6.4 |
| 2008 | 2008_House-G_IN-7 | House-G | 2008-10-26 | 400 | D+15.0 | D+30.2 | R+15.2 |
| 2008 | 2008_Gov-G_IN | Gov-G | 2008-10-26 | 800 | R+14.0 | R+17.8 | D+3.8 |
| 2008 | 2008_Pres-G_VT | Pres-G | 2008-10-25 | 400 | D+21.0 | D+37.2 | R+16.2 |
| 2008 | 2008_Pres-G_US | Pres-G | 2008-10-24 | 1,100 | D+11.0 | D+7.3 | D+3.7 |
| 2008 | 2008_Pres-G_IN | Pres-G | 2008-10-24 | 600 | D+1.0 | D+1.0 | R+0.0 |
| 2008 | 2008_House-G_US | House-G | 2008-10-24 | 1,100 | D+14.0 | D+11.1 | D+2.9 |
| 2008 | 2008_House-G_IN-2 | House-G | 2008-10-24 | 400 | D+14.0 | D+36.9 | R+22.9 |
| 2008 | 2008_Gov-G_IN | Gov-G | 2008-10-24 | 600 | R+12.0 | R+17.8 | D+5.8 |
| 2008 | 2008_Sen-G_SD | Sen-G | 2008-10-23 | 600 | D+22.0 | D+25.0 | R+3.0 |
| 2008 | 2008_Pres-G_WV | Pres-G | 2008-10-23 | 600 | R+6.0 | R+13.1 | D+7.1 |
| 2008 | 2008_Pres-G_SD | Pres-G | 2008-10-23 | 600 | R+9.0 | R+8.4 | R+0.6 |
| 2008 | 2008_House-G_FL-21 | House-G | 2008-10-23 | 400 | R+1.0 | R+15.8 | D+14.8 |
| 2008 | 2008_Sen-G_TN | Sen-G | 2008-10-22 | 600 | R+22.0 | R+33.5 | D+11.5 |
| 2008 | 2008_Sen-G_IL | Sen-G | 2008-10-22 | 800 | D+25.0 | D+39.3 | R+14.3 |
| 2008 | 2008_Pres-G_TN | Pres-G | 2008-10-22 | 600 | R+16.0 | R+15.1 | R+0.9 |
| 2008 | 2008_Pres-G_MO | Pres-G | 2008-10-22 | 800 | D+1.0 | R+0.1 | D+1.1 |
| 2008 | 2008_Pres-G_IL | Pres-G | 2008-10-22 | 800 | D+24.0 | D+25.1 | R+1.1 |
| 2008 | 2008_Pres-G_AR | Pres-G | 2008-10-22 | 600 | R+11.0 | R+19.9 | D+8.8 |
| 2008 | 2008_House-G_MO-9 | House-G | 2008-10-22 | 400 | R+5.0 | R+2.5 | R+2.5 |
| 2008 | 2008_House-G_IL-10 | House-G | 2008-10-22 | 400 | D+6.0 | R+5.1 | D+11.1 |
| 2008 | 2008_Gov-G_MO | Gov-G | 2008-10-22 | 800 | D+14.0 | D+18.9 | R+4.9 |
| 2008 | 2008_Pres-G_WI | Pres-G | 2008-10-21 | 600 | D+11.0 | D+13.9 | R+2.9 |
| 2008 | 2008_Pres-G_US | Pres-G | 2008-10-21 | 1,100 | D+10.0 | D+7.3 | D+2.7 |
| 2008 | 2008_Pres-G_IA | Pres-G | 2008-10-21 | 600 | D+15.0 | D+9.6 | D+5.4 |
| 2008 | 2008_House-G_WA-8 | House-G | 2008-10-21 | 400 | 0 | R+5.6 | D+5.6 |
| 2008 | 2008_House-G_US | House-G | 2008-10-21 | 1,100 | D+13.0 | D+11.1 | D+1.9 |
| 2008 | 2008_House-G_TX-10 | House-G | 2008-10-21 | 400 | R+4.0 | R+10.7 | D+6.7 |
| 2008 | 2008_House-G_SC-2 | House-G | 2008-10-21 | 400 | R+12.0 | R+7.6 | R+4.4 |
| 2008 | 2008_House-G_SC-1 | House-G | 2008-10-21 | 400 | R+11.0 | R+4.0 | R+7.0 |
| 2008 | 2008_House-G_NV-3 | House-G | 2008-10-21 | 400 | D+2.0 | D+5.1 | R+3.1 |
| 2008 | 2008_House-G_NJ-5 | House-G | 2008-10-21 | 400 | R+7.0 | R+13.5 | D+6.5 |
| 2008 | 2008_House-G_NC-10 | House-G | 2008-10-21 | 400 | R+15.0 | R+15.1 | D+0.1 |
| 2008 | 2008_House-G_MD-1 | House-G | 2008-10-21 | 400 | R+4.0 | D+0.8 | R+4.8 |
| 2008 | 2008_House-G_IA-4 | House-G | 2008-10-21 | 400 | R+5.0 | R+21.1 | D+16.1 |
| 2008 | 2008_House-G_FL-25 | House-G | 2008-10-21 | 400 | R+3.0 | R+6.1 | D+3.1 |
| 2008 | 2008_House-G_FL-13 | House-G | 2008-10-21 | 400 | R+11.0 | R+18.1 | D+7.0 |
| 2008 | 2008_House-G_CA-4 | House-G | 2008-10-21 | 400 | D+6.0 | R+0.5 | D+6.5 |
| 2008 | 2008_House-G_AZ-3 | House-G | 2008-10-21 | 400 | R+10.0 | R+12.0 | D+2.0 |
| 2008 | 2008_House-G_AL-2 | House-G | 2008-10-21 | 400 | R+2.0 | D+0.6 | R+2.6 |
| 2008 | 2008_Sen-G_KY | Sen-G | 2008-10-20 | 600 | R+4.0 | R+5.9 | D+1.9 |
| 2008 | 2008_Pres-G_KY | Pres-G | 2008-10-20 | 600 | R+16.0 | R+16.2 | D+0.2 |
| 2008 | 2008_Sen-G_NH | Sen-G | 2008-10-18 | 600 | D+7.0 | D+6.3 | D+0.7 |
| 2008 | 2008_Pres-G_US | Pres-G | 2008-10-18 | 1,100 | D+8.0 | D+7.3 | D+0.7 |
| 2008 | 2008_Pres-G_NH | Pres-G | 2008-10-18 | 600 | D+7.0 | D+9.6 | R+2.6 |
| 2008 | 2008_House-G_US | House-G | 2008-10-18 | 1,100 | D+13.0 | D+11.1 | D+1.9 |
| 2008 | 2008_House-G_NH-2 | House-G | 2008-10-18 | 300 | D+14.0 | D+15.0 | R+1.0 |
| 2008 | 2008_House-G_NH-1 | House-G | 2008-10-18 | 300 | D+5.0 | D+5.9 | R+0.9 |
| 2008 | 2008_Gov-G_NH | Gov-G | 2008-10-18 | 600 | D+26.0 | D+42.6 | R+16.6 |
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.