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Pollster file

Mitchell Research & Communications

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: 54
Mean absolute error: 4.64percentage points
Historical bias: D+1.16
Represented cycles: 121998–2024
Current archive: 47canonical records
History span: Oct 21, 1998through Nov 2, 2024

Identity

Known names and relationships

Known aliases: Mitchell Research
Organization type: Single canonical organization
Cycles represented: 1998 · 2000 · 2002 · 2004 · 2008 · 2012 · 2014 · 2016 · 2018 · 2020 · 2022 · 2024

54 eligible historical polls across 12 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 · 47 total

Race

Michigan · Governor

Benson +5

Don't know 9% · Perry Johnson 43% · Jocelyn Benson 48%

Field dates: Jul 28–Jul 29, 2026
Sample: 672 LV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Race

Michigan · Senate

Rogers +3

Don't know 11% · Haley Stevens 43% · Mike Rogers 46%

Field dates: Jul 28–Jul 29, 2026
Sample: 672 LV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Race

Michigan · Senate

Tied

Don't know 10% · Abdul El-Sayed 45% · Mike Rogers 45%

Field dates: Jul 28–Jul 29, 2026
Sample: 672 LV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Race

Michigan · Governor

Benson +2

Don't know 9% · John James 44% · Jocelyn Benson 46%

Field dates: Jul 28–Jul 29, 2026
Sample: 672 LV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Primary · R primary

Michigan · Governor

James +28

John James 50% · Perry Johnson 22% · Aric Nesbitt 5%

Field dates: Jul 29, 2026
Sample: 332 LV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Primary · D primary

Michigan · Senate

El-Sayed +14

Abdul El-Sayed 52% · Haley Stevens 38%

Field dates: Jul 29, 2026
Sample: 406 LV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Race

Michigan · Governor

Benson +7

Don't know 12% · Mike Cox 41% · Jocelyn Benson 48%

Field dates: Jun 11–Jun 13, 2026
Sample: 827 LV
Sponsor / client: MIRS News Service
Partisan sponsorship: No partisan sponsorship flag

Primary · R primary

Michigan · Governor

James +5

John James 28% · Perry Johnson 23% · Aric Nesbitt 4%

Field dates: Jun 13, 2026
Sample: 404 LV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Race

Michigan · Senate

Rogers +4

Don't know 13% · Mike Rogers 45% · Haley Stevens 41%

Field dates: Jun 11–Jun 13, 2026
Sample: 827 LV
Sponsor / client: MIRS News Service
Partisan sponsorship: No partisan sponsorship flag

Race

Michigan · Governor

Benson +11

Don't know 9% · John James 40% · Jocelyn Benson 51%

Field dates: Jun 11–Jun 13, 2026
Sample: 827 LV
Sponsor / client: MIRS News Service
Partisan sponsorship: No partisan sponsorship flag

Race

Michigan · Senate

Rogers +6

Don't know 12% · Mike Rogers 47% · Mallory McMorrow 41%

Field dates: Jun 11–Jun 13, 2026
Sample: 827 LV
Sponsor / client: MIRS News Service
Partisan sponsorship: No partisan sponsorship flag

Primary · D primary

Michigan · Senate

El-Sayed +9

Abdul El-Sayed 42% · Haley Stevens 33%

Field dates: Jun 13, 2026
Sample: 409 LV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

See this pollster in the Full Poll Archive →

Certified-result history

Eligible historical observations

50 shown · 54 total

Cycle	Race	Type	Field end	Sample	Poll	Result	Error
2024	MI · President	Pres-G	2024-11-02	—	D+1.5	R+1.4	D+2.9
2024	MI · President	Pres-G	2024-10-29	—	R+1.0	R+1.4	D+0.4
2024	AZ · President	Pres-G	2024-10-28	—	R+2.0	R+5.5	D+3.5
2022	2022_Sen-GR_GA	Sen-G	2022-12-04	625	D+5.0	D+2.8	D+2.2
2022	2022_Gov-G_MI	Gov-G	2022-11-03	658	D+2.0	D+10.5	R+8.5
2022	2022_House-G_MI-7	House-G	2022-11-02	402	R+0.9	D+5.4	R+6.3
2022	2022_Gov-G_MI	Gov-G	2022-10-19	541	D+2.0	D+10.5	R+8.5
2020	2020_Sen-G_MI	Sen-G	2020-10-29	817	D+5.4	D+1.7	D+3.7
2020	2020_Pres-G_MI	Pres-G	2020-10-29	817	D+7.1	D+2.8	D+4.3
2020	2020_Sen-G_MI	Sen-G	2020-10-26	759	D+9.6	D+1.7	D+7.9
2020	2020_Pres-G_MI	Pres-G	2020-10-26	759	D+10.4	D+2.8	D+7.6
2020	2020_Sen-G_MI	Sen-G	2020-10-18	900	D+6.0	D+1.7	D+4.3
2020	2020_Pres-G_MI	Pres-G	2020-10-18	900	D+10.0	D+2.8	D+7.2
2018	2018_Sen-G_MI	Sen-G	2018-11-05	827	D+3.0	D+6.5	R+3.5
2018	2018_Gov-G_MI	Gov-G	2018-11-05	827	D+7.8	D+9.6	R+1.8
2018	2018_Sen-G_MI	Sen-G	2018-11-04	701	D+7.0	D+6.5	D+0.5
2018	2018_Gov-G_MI	Gov-G	2018-11-04	701	D+14.0	D+9.6	D+4.4
2018	2018_Sen-G_MI	Sen-G	2018-10-25	400	D+6.0	D+6.5	R+0.5
2018	2018_Gov-G_MI	Gov-G	2018-10-25	400	D+5.0	D+9.6	R+4.6
2016	2016_Pres-G_MI	Pres-G	2016-11-06	1,011	D+6.0	R+0.2	D+6.2
2016	2016_Pres-G_MI	Pres-G	2016-11-03	1,007	D+5.0	R+0.2	D+5.2
2016	2016_Pres-G_MI	Pres-G	2016-11-02	1,150	D+4.0	R+0.2	D+4.2
2016	2016_Pres-G_MI	Pres-G	2016-11-01	887	D+4.0	R+0.2	D+4.2
2016	2016_Pres-G_MI	Pres-G	2016-10-31	737	D+6.5	R+0.2	D+6.7
2016	2016_Pres-G_MI	Pres-G	2016-10-30	953	D+7.3	R+0.2	D+7.5
2016	2016_Pres-G_MI	Pres-G	2016-10-25	1,030	D+6.0	R+0.2	D+6.2
2016	2016_Pres-G_MI	Pres-G	2016-10-23	1,241	D+8.0	R+0.2	D+8.2
2016	2016_Pres-G_MI	Pres-G	2016-10-18	1,102	D+12.5	R+0.2	D+12.7
2014	2014_Sen-G_MI	Sen-G	2014-11-02	1,224	D+12.0	D+13.3	R+1.3
2014	2014_Gov-G_MI	Gov-G	2014-11-02	1,224	0	R+4.1	D+4.1
2014	2014_Sen-G_MI	Sen-G	2014-10-27	1,159	D+14.1	D+13.3	D+0.8
2014	2014_Gov-G_MI	Gov-G	2014-10-27	1,159	R+4.9	R+4.1	R+0.8
2014	2014_Sen-G_MI	Sen-G	2014-10-19	919	D+13.6	D+13.3	D+0.3
2014	2014_Gov-G_MI	Gov-G	2014-10-19	919	R+2.3	R+4.1	D+1.8
2014	2014_House-G_MI-11	House-G	2014-10-15	472	R+12.0	R+15.4	D+3.4
2012	2012_Sen-G_MI	Sen-G	2012-11-04	1,305	D+14.0	D+20.8	R+6.8
2012	2012_Pres-G_MI	Pres-G	2012-11-04	1,305	D+5.0	D+9.5	R+4.5
2008	2008_Pres-G_MI	Pres-G	2008-11-03	400	D+16.0	D+16.5	R+0.5
2008	2008_Pres-G_MI	Pres-G	2008-10-28	600	D+14.0	D+16.5	R+2.5
2004	2004_Pres-G_MI	Pres-G	2004-10-27	600	D+2.0	D+3.4	R+1.4
2004	2004_Pres-G_MI	Pres-G	2004-10-23	600	D+1.0	D+3.4	R+2.4
2004	2004_Pres-G_MI	Pres-G	2004-10-19	400	R+4.0	D+3.4	R+7.4
2002	2002_Sen-G_MI	Sen-G	2002-10-29	600	D+30.0	D+22.7	D+7.3
2002	2002_Gov-G_MI	Gov-G	2002-10-29	600	D+13.0	D+4.0	D+9.0
2002	2002_Sen-G_MI	Sen-G	2002-10-22	600	D+34.0	D+22.7	D+11.3
2002	2002_Gov-G_MI	Gov-G	2002-10-22	600	D+8.0	D+4.0	D+4.0
2002	2002_Sen-G_MI	Sen-G	2002-10-15	600	D+26.0	D+22.7	D+3.3
2002	2002_Gov-G_MI	Gov-G	2002-10-15	600	D+12.0	D+4.0	D+8.0
2000	2000_Sen-G_MI	Sen-G	2000-11-01	800	R+3.0	D+1.6	R+4.6
2000	2000_Pres-G_MI	Pres-G	2000-11-01	800	D+5.0	D+5.1	R+0.1

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.