Gary C. Peters

Senator · MI · D

Current term Jan 3, 2021 – Jan 3, 2027 · In the Senate since Jan 6, 2015

Official website Contact form Biographical Directory

Portrait: U.S. Government Publishing Office, via unitedstates/images (public domain)

Working relationships

How often this member works with colleagues across party lines, from bill sponsorships and recorded votes in this Congress. Bills are H.R., S., H.J.Res. and S.J.Res.; resolutions, post office namings, and Congressional Gold Medal and commemorative coin bills are left out. Independents are counted with the party they caucus with. These figures describe the public record; they do not measure effectiveness or ideology.

Gary C. Peters · ChamberLens.org

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Gary C. Peters

Senator · MI · D

Current term Jan 3, 2021 – Jan 3, 2027 · In the Senate since Jan 6, 2015

Official website Contact form Biographical Directory

Portrait: U.S. Government Publishing Office, via unitedstates/images (public domain)

Working relationships

119th Congress, Senate.

Bills with other-party backing

84%

64 of 76 bills they sponsored had at least one original cosponsor from the other party.

Senate median 41% · Democrats 35%

Cosponsoring the other party's bills

51%

101 of 197 bills they cosponsored were introduced by a Republican.

Senate median 19% · Democrats 22%

Voting with own party

95%

On 823 party-line votes, voted with most Democrats 780 times.

Senate median 99% · Democrats 96%

Voting with the other party

10%

On 874 contested votes, voted the same way as most Republicans 91 times.

Senate median 6% · Democrats 8%

Closest collaborators

Counted both ways: bills by the colleague that this member cosponsored, and bills by this member that the colleague cosponsored.

All colleagues

James LankfordROK4 of theirs · 11 of this member's
Marsha BlackburnRTN4 of theirs · 8 of this member's
Tammy BaldwinDWI5 of theirs · 6 of this member's
Susan M. CollinsRME5 of theirs · 6 of this member's
John CornynRTX5 of theirs · 6 of this member's
Tim KaineDVA5 of theirs · 5 of this member's
Joni ErnstRIA1 of theirs · 9 of this member's
Elissa SlotkinDMI0 of theirs · 10 of this member's
Bill CassidyRLA5 of theirs · 4 of this member's
Chuck GrassleyRIA5 of theirs · 4 of this member's

Across the aisle (Republicans)

James LankfordROK4 of theirs · 11 of this member's
Marsha BlackburnRTN4 of theirs · 8 of this member's
Susan M. CollinsRME5 of theirs · 6 of this member's
John CornynRTX5 of theirs · 6 of this member's
Joni ErnstRIA1 of theirs · 9 of this member's
Bill CassidyRLA

Voting most alike

Contested roll calls (at least 10% of yea and nay votes on the losing side) on which both voted yea or nay, and how often they made the same choice. Colleagues who shared too few of these votes with this member are not ranked.

Most alike

Tammy BaldwinDWI94% · 821 of 871
Elissa SlotkinDMI94% · 803 of 852
Michael F. BennetDCO94% · 754 of 801
Richard BlumenthalDCT94% · 813 of 864
Charles E. SchumerDNY94% · 816 of 870

Bipartisan bills that advanced

Bills this member sponsored or joined as an original cosponsor, with original backers from both parties, that passed at least one chamber (25). Furthest along first.

Became lawS. 269Ending Improper Payments to Deceased People Act
Original cosponsor · sponsored by John Kennedy · original backers: 1 D, 1 R · became law Feb 10, 2026
Became lawS. 2878Great Lakes Fishery Research Reauthorization Act
Sponsor · original backers: 1 D, 1 R · became law Dec 26, 2025
Became lawS. 146TAKE IT DOWN Act
Original cosponsor · sponsored by Ted Cruz · original backers: 8 D, 11 R · became law May 19, 2025
Passed the SenateS. 528GLRI Act of 2026
Sponsor · original backers: 10 D, 3 R · passed the Senate Sep 29, 2026
Passed the SenateS. 3404Satellite Cybersecurity Act of 2025
Sponsor · original backers: 1 D, 1 R · passed the Senate Sep 23, 2026
Passed the SenateS. 2542

Each member's party on each date comes from congress-legislators term records. Party-line votes are roll calls on which most voting Democrats and most voting Republicans took opposite sides; procedural votes are included. The Vice President's tie-breaking votes and impeachment verdicts are not counted, and a bill enacted as part of another bill counts only at the stage it reached on its own. Medians include everyone who served in the chamber this Congress with enough records (5 sponsored bills, 10 cosponsorships, 25 votes). Computed Oct 23, 2026, 11:51 AM ET from Congress.gov and House and Senate roll calls.

119th Congress, Senate.

Bills with other-party backing

84%

64 of 76 bills they sponsored had at least one original cosponsor from the other party.

Senate median 41% · Democrats 35%

Cosponsoring the other party's bills

51%

101 of 197 bills they cosponsored were introduced by a Republican.

Senate median 19% · Democrats 22%

Voting with own party

95%

On 823 party-line votes, voted with most Democrats 780 times.

Senate median 99% · Democrats 96%

Voting with the other party

10%

On 874 contested votes, voted the same way as most Republicans 91 times.

Senate median 6% · Democrats 8%

Closest collaborators

Counted both ways: bills by the colleague that this member cosponsored, and bills by this member that the colleague cosponsored.

All colleagues

James LankfordROK4 of theirs · 11 of this member's
Marsha BlackburnRTN4 of theirs · 8 of this member's
Tammy BaldwinDWI5 of theirs · 6 of this member's
Susan M. CollinsRME5 of theirs · 6 of this member's
John CornynRTX5 of theirs · 6 of this member's
Tim KaineDVA5 of theirs · 5 of this member's
Joni ErnstRIA1 of theirs · 9 of this member's
Elissa SlotkinDMI0 of theirs · 10 of this member's
Bill CassidyRLA5 of theirs · 4 of this member's
Chuck GrassleyRIA5 of theirs · 4 of this member's

Across the aisle (Republicans)

James LankfordROK4 of theirs · 11 of this member's
Marsha BlackburnRTN4 of theirs · 8 of this member's
Susan M. CollinsRME5 of theirs · 6 of this member's
John CornynRTX5 of theirs · 6 of this member's
Joni ErnstRIA1 of theirs · 9 of this member's
Bill CassidyRLA

Voting most alike

Most alike

Tammy BaldwinDWI94% · 821 of 871
Elissa SlotkinDMI94% · 803 of 852
Michael F. BennetDCO94% · 754 of 801
Richard BlumenthalDCT94% · 813 of 864
Charles E. SchumerDNY94% · 816 of 870

Bipartisan bills that advanced

Bills this member sponsored or joined as an original cosponsor, with original backers from both parties, that passed at least one chamber (25). Furthest along first.

Became lawS. 269Ending Improper Payments to Deceased People Act
Original cosponsor · sponsored by John Kennedy · original backers: 1 D, 1 R · became law Feb 10, 2026
Became lawS. 2878Great Lakes Fishery Research Reauthorization Act
Sponsor · original backers: 1 D, 1 R · became law Dec 26, 2025
Became lawS. 146TAKE IT DOWN Act
Original cosponsor · sponsored by Ted Cruz · original backers: 8 D, 11 R · became law May 19, 2025
Passed the SenateS. 528GLRI Act of 2026
Sponsor · original backers: 10 D, 3 R · passed the Senate Sep 29, 2026
Passed the SenateS. 3404Satellite Cybersecurity Act of 2025
Sponsor · original backers: 1 D, 1 R · passed the Senate Sep 23, 2026
Passed the SenateS. 2542

Gary C. Peters

Working relationships

Gary C. Peters

Working relationships

Closest collaborators

All colleagues

Across the aisle (Republicans)

Voting most alike

Most alike

Bipartisan bills that advanced

Closest collaborators

All colleagues

Across the aisle (Republicans)

Voting most alike

Most alike

Bipartisan bills that advanced

Most alike among Republicans