# Rosemary Bayer

Rosemary Bayer is a Democratic member of the Michigan Senate for district 13.

- Party: Democrat
- Seat: Michigan Senate, district 13
- Serving since: 2023-01-01
- Current term: MI 2025–26 session
- Open States ID: ocd-person/3e24c95f-2ed8-442a-a41f-1a3a9a0b95ed

Source: https://americaspoliticalpulse.com/p/3e24c95f-2ed8-442a-a41f-1a3a9a0b95ed (America’s Political Pulse, Polarization Research Lab), data through 2026-10-27. Data under CC BY 4.0. Cite as: Westwood, Sean J., and Yphtach Lelkes. 2024. America's Political Pulse [data set].

## Headline

100% of Bayer’s itemized money in the 2026 cycle came from Michigan, in the top quarter of State Senate Democrats.

## Ideology (CSIP)

CSIP score −0.60 (standard error 0.01), from 2,425 donors and 1,164 roll calls. Negative is left of 0, positive right of it, on one scale for every official. 59% of State Senate Democrats score lower.

## Votes (MI 2025–26 session)

523 roll calls. Attendance 98.6% (Michigan Senate 95.5%). Party unity 97.3% (92.6%). 12 votes against the party majority.

Key votes:

- 2026-10-14 · voted not voting · PASSED; GIVEN IMMEDIATE EFFECT ROLL CALL # 263 YEAS 31 NAYS 3 EXCUSED 4 NOT VOTING 0 · HB 5356 Vehicles: title; requirements for transfer of title by a dealer; provide for. Amends 14, 41a, 78, 217, 217c, 233, 233a, 233b, 234, 238, 239, 240, 248,… · pass · https://openstates.org/mi/bills/2025-2026/HB5356/
- 2026-10-01 · voted yea · ROLL CALL: ROLL CALL # 260 YEAS 34 NAYS 2 EXCUSED 2 NOT VOTING 0 · SB 947 Natural resources: inland lakes; dam safety regulations; provide for. Amends and adds (See bill). TIE BAR WITH: HB 5485'26 · pass · https://openstates.org/mi/bills/2025-2026/SB947/
- 2026-10-01 · voted yea · PASSED; GIVEN IMMEDIATE EFFECT ROLL CALL # 247 YEAS 34 NAYS 2 EXCUSED 2 NOT VOTING 0 · HB 5485 Natural resources: inland lakes; dam safety regulations; provide for. Amends secs. 31502, 31503, 31504, 31505, 31506, 31507, 31508, 31509, 31510,… · pass · https://openstates.org/mi/bills/2025-2026/HB5485/
- 2026-10-01 · voted yea · PASSED; GIVEN IMMEDIATE EFFECT ROLL CALL # 253 YEAS 36 NAYS 0 EXCUSED 2 NOT VOTING 0 · HB 4598 Crimes: organized; gift card fraud; provide for. Amends sec. 4 of 2012 PA 455 (MCL 752.1084). · pass · https://openstates.org/mi/bills/2025-2026/HB4598/
- 2026-10-01 · voted yea · PASSED ROLL CALL # 258 YEAS 33 NAYS 3 EXCUSED 2 NOT VOTING 0 · SB 791 Highways: memorial; portion of I-475; designate as the "St. John Street Community Memorial Highway". Amends 2001 PA 142 (MCL 250.1001 - 250.2092) by… · pass · https://openstates.org/mi/bills/2025-2026/SB791/
- 2026-10-01 · voted yea · PASSED; GIVEN IMMEDIATE EFFECT ROLL CALL # 248 YEAS 32 NAYS 4 EXCUSED 2 NOT VOTING 0 · HB 4703 Insurance: health insurers; coverage for group prenatal care services; require. Amends 1956 PA 218 (MCL 500.100 - 500.8302) by adding sec. 3406ss. · pass · https://openstates.org/mi/bills/2025-2026/HB4703/
- 2026-10-01 · voted yea · PASSED; GIVEN IMMEDIATE EFFECT ROLL CALL # 256 YEAS 35 NAYS 1 EXCUSED 2 NOT VOTING 0 · HB 5514 Children: other; prohibition of use of certain restraint while transporting youths to certain youth residential treatment programs; provide for.… · pass · https://openstates.org/mi/bills/2025-2026/HB5514/
- 2026-10-01 · voted yea · PASSED; GIVEN IMMEDIATE EFFECT ROLL CALL # 250 YEAS 36 NAYS 0 EXCUSED 2 NOT VOTING 0 · HB 4302 Vehicles: emergency vehicles; exception to commercial driver license for authorized emergency vehicles of Michigan Mutual Aid Box Alarm System;… · pass · https://openstates.org/mi/bills/2025-2026/HB4302/
- 2026-10-01 · voted yea · ROLL CALL: ROLL CALL # 259 YEAS 36 NAYS 0 EXCUSED 2 NOT VOTING 0 · SB 433 State agencies (existing): health and human services; educational materials regarding health dangers for youth using high-potency THC and cannabis… · pass · https://openstates.org/mi/bills/2025-2026/SB433/
- 2026-10-01 · voted yea · PASSED; GIVEN IMMEDIATE EFFECT ROLL CALL # 249 YEAS 36 NAYS 0 EXCUSED 2 NOT VOTING 0 · HB 4301 Vehicles: emergency vehicles; definition of authorized emergency vehicle; expand. Amends secs. 2 & 698 of 1949 PA 300 (MCL 257.2 & 257.698). TIE BAR… · pass · https://openstates.org/mi/bills/2025-2026/HB4301/

## Legislation (MI 2025–26 session)

Sponsored 55 bills: 55 reached committee, 13 passed one chamber, 0 passed both, 0 became law. Cosponsored 371. 23.6% of sponsored bills got out of committee (Michigan Senate 38.2%; rank 28 of 38).

Recent sponsored bills:

- SB 1183: Natural resources: shorelands; inspections of high-risk docks and seawalls; require. Amends 1994 PA 451 (MCL 324.101 - 324.90106) by adding pt. 344. TIE BAR… (in committee, 2026-09-22) https://openstates.org/mi/bills/2025-2026/SB1183/
- SB 1046: Water supply: conservation; permit for water used for consumptive use purposes; provide for. Amends secs. 32705, 32708a, 32713 & 32723 of 1994 PA 451 (MCL… (in committee, 2026-09-10) https://openstates.org/mi/bills/2025-2026/SB1046/
- SB 1000: Human services: medical services; certified community behavioral health clinics; provide certification and funding for. Amends 1939 PA 280 (MCL 400.1 -… (in committee, 2026-05-21) https://openstates.org/mi/bills/2025-2026/SB1000/
- SB 1007: Mental health: guardians; appointing certain guardians after considering least restrictive means; require. Amends sec. 602 of 1974 PA 258 (MCL 330.1602). (in committee, 2026-05-21) https://openstates.org/mi/bills/2025-2026/SB1007/
- SB 946: Children: child care; child care provider funding program; create. Amends 1973 PA 116 (MCL 722.111 - 722.128) by adding sec. 13b. TIE BAR WITH: SB 0945'26 (in committee, 2026-05-07) https://openstates.org/mi/bills/2025-2026/SB946/
- SB 945: State management: funds; interest earned from money in the countercyclical budget and economic stabilization fund; deposit into the child care payment fund.… (in committee, 2026-05-07) https://openstates.org/mi/bills/2025-2026/SB945/
- SB 937: Mobile homes: other; mobile home commission act; revise. Amends secs. 35, 41, 43 & 48 of 1987 PA 96 (MCL 125.2335 et seq.) & adds sec. 30m. TIE BAR WITH: SB… (passed one chamber, 2026-05-19) https://openstates.org/mi/bills/2025-2026/SB937/
- SB 932: Public utilities: electric utilities; guidelines for applications for certificates of public convenience and necessity; provide for. Amends sec. 6 of 1995 PA… (in committee, 2026-04-23) https://openstates.org/mi/bills/2025-2026/SB932/
- SB 933: Public utilities: electric utilities; electronic transmission infrastructure; allow to use existing rights-of-way. Amends sec. 13 of 1925 PA 368 (MCL 247.183)… (in committee, 2026-04-23) https://openstates.org/mi/bills/2025-2026/SB933/
- SB 917: Mental health: other; 988 crisis lifeline system fund and telecommunications fee; provide for. Amends 1974 PA 258 (MCL 330.1001 - 330.2106) by adding secs.… (in committee, 2026-04-22) https://openstates.org/mi/bills/2025-2026/SB917/

## Campaign money (2026 cycle)

Itemized receipts $14.8K (State Senate Democrats median $55.5K). 100% of itemized individual money came from in state. Aggregates only; no individual donors.

## Links

- Official site: https://senatedems.com/bayer/
- Campaign site: https://www.rosemarybayer.com/
- X: https://x.com/rosemarybayer
- Facebook: https://www.facebook.com/SenRosemaryBayer/
- Instagram: https://www.instagram.com/rosemary.bayer/?hl=en
- LinkedIn: https://www.linkedin.com/in/rosemarybayer/

Full profile, with every chart and the methods: https://americaspoliticalpulse.com/p/3e24c95f-2ed8-442a-a41f-1a3a9a0b95ed