Marketing Resource Group (MRG)
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
- 6
- Mean absolute error
- 8.61percentage points
- Historical bias
- D+0.56
- Represented cycles
- 42000–2018
- Current archive
- 0canonical records
- History span
- Oct 25, 2000through Oct 16, 2018
Known names and relationships
- Known aliases
- No additional reviewed aliases
- Organization type
- Single canonical organization
- Cycles represented
- 2000 · 2010 · 2016 · 2018
6 eligible historical polls is a limited denominator; both MAE and bias may move materially as another cycle is added.
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
6 shown · 6 total
| Cycle | Race | Type | Field end | Sample | Poll | Result | Error |
|---|---|---|---|---|---|---|---|
| 2018 | 2018_Sen-G_MI | Sen-G | 2018-10-16 | 600 | D+16.0 | D+6.5 | D+9.5 |
| 2018 | 2018_Gov-G_MI | Gov-G | 2018-10-16 | 600 | D+14.0 | D+9.6 | D+4.4 |
| 2016 | 2016_Pres-G_MI | Pres-G | 2016-10-18 | 600 | D+5.0 | R+0.2 | D+5.2 |
| 2010 | 2010_House-G_MI-7 | House-G | 2010-10-25 | 400 | D+7.0 | R+4.8 | D+11.8 |
| 2000 | 2000_Sen-G_MI | Sen-G | 2000-10-25 | 500 | R+8.0 | D+1.6 | R+9.6 |
| 2000 | 2000_Pres-G_MI | Pres-G | 2000-10-25 | 500 | R+6.0 | D+5.1 | R+11.1 |
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.