Michigan Senate · District 13

Rosemary Bayer

Democratic

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Votes with the Senate Majority Leader 96% On 359 contested votes where both voted · 98% on all votes Votes with own party 98% Partisan rank: 17 of 38 in the Senate (tied with 3 others) Didn't vote at roll call 1% 8 of 631 roll calls · 8 of them excused

Bills passed 0 51 sponsored · 0 became law · Rank 27 of 38 in the Senate (tied with 11 others) Bills that became law 0 of 0 passed · 0 vetoed

Where they sit

Every current senator, placed from most liberal to most conservative by how they voted on contested bills.

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Votes with DemocratsCrosses party linesVotes with Republicans

Rosemary Bayer's seat is marked. Seats run from most liberal (left) to most conservative (right), by contested floor votes. Color shows how often each member crosses party lines toward the middle on votes that divide the parties: solid blue or red means almost never, and purple means on at least 1 in 5 of those votes. Gray seats are members too new to score. How these numbers work

Michigan Senate24thpercentile

More liberal than 75% of the Michigan Senate.

Most liberalMost conservative

10th most liberal of 38

The scores

How these numbers work →

Votes with the Senate Majority Leader

96%

Each tick is a current senator, by party; the dot is Rosemary Bayer.

On 359 contested votes where both voted98% on all 623 votes where both voted

Votes with own party

98%

Each tick is a current senator, by party; the dot is Rosemary Bayer.

On 286 party-line votesPartisan rank: 17 of 38 in the Senate (tied with 3 others)16 senators vote with their party more often

Bills

The bills Rosemary Bayer sponsored this term and how far they got. Co-sponsors aren’t counted.

How these numbers work →

Bills: Rosemary Bayer
	Bills
Sponsored	51
Passed both chambers	0
Became law	0
Vetoed by the Governor	0

Rank by bills passed: Rank 27 of 38 in the Senate (tied with 11 others) · 18 of 20 Democrats (tied with 2 others)

A bill's sponsor is its primary sponsor, the first name on it; co-sponsors aren't counted.

Bills that passed both chambers

None of the bills Rosemary Bayer sponsored passed both chambers.

Budget projects

The Michigan pages don't credit legislators with budget items.

Contested votes where they split

15 against the Senate Majority Leader; 13 against most of their party.

Contested votes where they split: Rosemary Bayer
Date	Bill and motion	Their vote	Senate Majority Leader	Most of their party
April 30, 2026	SB 877: Appropriations: supplemental; appropriations for multiple departments and branches for fiscal year 2025-2026; provide for Amendment	Nay	Yea (split)	Yea (split)
April 29, 2026	SB 760: Trade: business regulation; availability of companion chatbots to minors; prohibit Passage	Nay	Yea (split)	Yea (split)
April 29, 2026	SB 759: Consumer protection: privacy; Michigan consumer protection act; amend to include violation of kids code act as violation Passage	Nay	Yea (split)	Yea (split)
April 29, 2026	SB 758: Communications: internet; Michigan kids code act; create Passage	Nay	Yea (split)	Yea (split)
April 29, 2026	SB 757: Communications: social media; addictive feeds for minors by social media platforms; prohibit Passage	Nay	Yea (split)	Yea (split)
Nov. 13, 2025	HB 5055: Law enforcement: other; jurisdiction of sergeant at arms; modify Passage	Nay	Yea (split)	Yea (split)
Oct. 3, 2025	HB 4182: Use tax: exemptions; motor fuel sales; exempt Passage	Nay	Yea (split)	Yea (split)
Oct. 3, 2025	HB 4181: Streamline sales and use tax: exemptions; tax on motor fuel; exclude Passage	Nay	Yea (split)	Yea (split)
Oct. 3, 2025	HB 4180: Sales tax: exemptions; motor fuel sales; exempt Passage	Nay	Yea (split)	Yea (split)
Sept. 4, 2025	SB 396: Environmental protection: air pollution; regulation of carbon sequestration; provide for Passage	Nay	Yea (split)	Yea (split)
Sept. 4, 2025	SB 395: Natural resources: gas and oil; definitions in the crude oil and petroleum act; update Passage	Nay	Yea (split)	Yea (split)
Sept. 4, 2025	SB 394: Natural resources: gas and oil; ownership and conveyance rights associated with pore space; establish Passage	Nay	Yea (split)	Yea (split)
June 17, 2025	SB 424: Criminal procedure: sex offender registration; sex offender registration act; modify Passage	Nay	Yea (split)	Yea (split)
Feb. 20, 2025	HB 4002: Labor: benefits; requirements for an employer to provide earned sick time, modify Passage	Nay	Yea (split)	Nay
Feb. 13, 2025	SB 8: Labor: hours and wages; minimum hourly wage rate; modify Passage	Nay	Yea (split)	Nay

Every roll call

How Rosemary Bayer voted on each of the 631 floor roll calls while in office, newest first.

Every roll call: Rosemary Bayer
Date	Vote	Their vote	Most of their party	Senate Majority Leader	Yeas–nays
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Contested and party-line votes link to their own pages; the rest link to the official record.

Contact, committees and caucuses

Contact

Email: senrbayer@senate.michigan.gov
Capitol office: Room 3100, Binsfeld Building P.O. Box 30036, Lansing, MI 48909
517-373-2417

Committees

Administrative Rules
Appropriations
Energy and Environment
Finance, Insurance and Consumer Protection
Housing and Human Services
Local Government

Contact details and committee assignments from Open States' data on the Michigan Legislature, which it collects from the chambers' websites, as of Oct. 15, 2026.

Source: the Michigan House and Senate Journals, Jan. 8, 2025 to Oct. 14, 2026. How these numbers work · Corrections