Don't know 15.3% · Someone else 1.3% · Mike Duggan 23.3% · Perry Johnson 26% · Jocelyn Benson 34%
- Field dates
- Apr 28–May 1, 2026
- Sample
- 600 LV
- Sponsor / client
- Detroit Regional Chamber
- Partisan sponsorship
- No partisan sponsorship flag
Pollster file
Glengariff Group
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
- 13
- Mean absolute error
- 4.44percentage points
- Historical bias
- D+1.06
- Represented cycles
- 72010–2024
- Current archive
- 62canonical records
- History span
- Oct 26, 2010through Oct 24, 2024
Identity
Known names and relationships
- Known aliases
- Glengariff Group, Inc.
- Organization type
- Single canonical organization
- Cycles represented
- 2010 · 2012 · 2014 · 2018 · 2020 · 2022 · 2024
13 eligible historical polls across 7 represented cycles passed the published history identity checks. Historical bias is descriptive and is kept separate from sponsor or client affiliation.
Canonical 2025–2026 archive
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.
12 shown · 62 total
Don't know 12.5% · Someone else 1.2% · Mike Duggan 23% · John James 29.2% · Jocelyn Benson 34.2%
- Field dates
- Apr 28–May 1, 2026
- Sample
- 600 LV
- Sponsor / client
- Detroit Regional Chamber
- Partisan sponsorship
- No partisan sponsorship flag
Don't know 16.5% · Someone else 0% · Mallory McMorrow 40.7% · Mike Rogers 42.8%
- Field dates
- Apr 28–May 1, 2026
- Sample
- 600 LV
- Sponsor / client
- Detroit Regional Chamber
- Partisan sponsorship
- No partisan sponsorship flag
Primary · R primary
James +17Michigan · Governor
John James 37% · Perry Johnson 20% · Tom Leonard 3% · Aric Nesbitt 7%
- Field dates
- Apr 24, 2026
- Sample
- 500 LV
- Sponsor / client
- Not reported in archive
- Partisan sponsorship
- No partisan sponsorship flag
Primary · D primary
Stevens +2Michigan · Senate
Abdul El-Sayed 23% · Haley Stevens 25%
- Field dates
- Apr 19, 2026
- Sample
- 500 LV
- Sponsor / client
- Not reported in archive
- Partisan sponsorship
- No partisan sponsorship flag
Primary · D primary
Benson +58Michigan · Governor
Jocelyn Benson 66% · Christopher Robert Swanson 8%
- Field dates
- Apr 19, 2026
- Sample
- 500 LV
- Sponsor / client
- Not reported in archive
- Partisan sponsorship
- No partisan sponsorship flag
Don't know 12.3% · Someone else 1% · Mike Duggan 57.2% · John James 29.5%
- Field dates
- Jan 27–Feb 2, 2026
- Sample
- 600 RV
- Sponsor / client
- Detroit Regional Chamber
- Partisan sponsorship
- No partisan sponsorship flag
Don't know 13.1% · Someone else 2.2% · Mike Duggan 53.4% · Jocelyn Benson 31.3%
- Field dates
- Jan 27–Feb 2, 2026
- Sample
- 600 RV
- Sponsor / client
- Detroit Regional Chamber
- Partisan sponsorship
- No partisan sponsorship flag
Don't know 13.1% · Someone else 1% · Mike Duggan 29.8% · Jocelyn Benson 27.8% · John James 28.3%
- Field dates
- Jan 27–Feb 2, 2026
- Sample
- 600 RV
- Sponsor / client
- Detroit Regional Chamber
- Partisan sponsorship
- No partisan sponsorship flag
Don't know 12% · Someone else 1% · Mike Duggan 30.1% · Jocelyn Benson 28% · John James 28.9%
- Field dates
- Jan 27–Feb 2, 2026
- Sample
- Not reported LV
- Sponsor / client
- Detroit Regional Chamber
- Partisan sponsorship
- No partisan sponsorship flag
Don't know 11.4% · Someone else 2.8% · Jocelyn Benson 45% · John James 40.8%
- Field dates
- Jan 27–Feb 2, 2026
- Sample
- Not reported LV
- Sponsor / client
- Detroit Regional Chamber
- Partisan sponsorship
- No partisan sponsorship flag
Don't know 12.1% · Someone else 2.8% · Jocelyn Benson 44.6% · John James 40.4%
- Field dates
- Jan 27–Feb 2, 2026
- Sample
- 600 RV
- Sponsor / client
- Detroit Regional Chamber
- Partisan sponsorship
- No partisan sponsorship flag
Certified-result history
Eligible historical observations
13 shown · 13 total
| Cycle | Race | Type | Field end | Sample | Poll | Result | Error |
|---|---|---|---|---|---|---|---|
| 2024 | MI · President | Pres-G | 2024-10-24 | — | D+3.0 | R+1.4 | D+4.4 |
| 2022 | 2022_Gov-G_MI | Gov-G | 2022-10-27 | 600 | D+8.6 | D+10.5 | R+1.9 |
| 2022 | 2022_House-G_MI-7 | House-G | 2022-10-19 | 400 | D+5.7 | D+5.4 | D+0.3 |
| 2020 | 2020_Sen-G_MI | Sen-G | 2020-10-24 | 600 | D+9.6 | D+1.7 | D+7.9 |
| 2020 | 2020_Pres-G_MI | Pres-G | 2020-10-24 | 600 | D+7.7 | D+2.8 | D+4.9 |
| 2018 | 2018_Sen-G_MI | Sen-G | 2018-10-26 | 600 | D+16.7 | D+6.5 | D+10.2 |
| 2018 | 2018_Gov-G_MI | Gov-G | 2018-10-26 | 600 | D+12.5 | D+9.6 | D+2.9 |
| 2014 | 2014_Sen-G_MI | Sen-G | 2014-10-23 | 600 | D+15.1 | D+13.3 | D+1.8 |
| 2014 | 2014_Gov-G_MI | Gov-G | 2014-10-23 | 600 | R+5.0 | R+4.1 | R+0.9 |
| 2012 | 2012_Sen-G_MI | Sen-G | 2012-10-28 | 600 | D+14.9 | D+20.8 | R+5.9 |
| 2012 | 2012_Pres-G_MI | Pres-G | 2012-10-28 | 600 | D+2.7 | D+9.5 | R+6.8 |
| 2012 | 2012_House-G_MI-3 | House-G | 2012-10-18 | 400 | D+1.0 | R+8.4 | D+9.4 |
| 2010 | 2010_Gov-G_MI | Gov-G | 2010-10-26 | 600 | R+18.0 | R+18.2 | D+0.2 |
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.