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Party voting

Party cohesion

How often do Massachusetts legislators vote with their party?

Party Voting Unity

How often members of each party vote together on the same side.

Most Contentious Votes

Votes where both parties were most internally divided. Higher % = more divided.

H 5469

An Act promoting transparency and public access in state government

30%

House pass 122-28 Jun 3, 2026

H 5305

An Act promoting rule of law, oversight, trust and equal constitutional treatment

29%

House pass 124-25 Mar 25, 2026

H 4000

An Act making appropriations for the fiscal year 2026 for the maintenance of the departments, boards, commissions, institutions, and certain activities of the commonwealth, for interest, sinking fund, and serial bond requirements, and for certain permanent improvements

29%

House pass 126-24 Apr 30, 2025

H 5500

An Act making appropriations for the fiscal year 2027 for the maintenance of the departments, boards, commissions, institutions, and certain activities of the commonwealth, for interest, sinking fund, and serial bond requirements, and for certain permanent improvements

26%

House pass 128-23 Apr 27, 2026

S 2543

An Act strengthening health care protections in the Commonwealth

26%

House pass 130-23 Jul 16, 2025

H 4000

An Act making appropriations for the fiscal year 2026 for the maintenance of the departments, boards, commissions, institutions, and certain activities of the commonwealth, for interest, sinking fund, and serial bond requirements, and for certain permanent improvements

24%

House pass 127-21 Apr 29, 2025

H 4240

An Act making appropriations for the fiscal year 2026 for the maintenance of the departments, boards, commissions, institutions and certain activities of the Commonwealth, for interest, sinking fund and serial bond requirements, and for certain permanent improvements

23%

House pass 136-16 Oct 8, 2025

H 4672

Crossed the Aisle

Legislators who most frequently vote against their own party.

Kim Ferguson

House·29 against party

12.7% R

Jon Zlotnik

House·29 against party

12.6% D

Paul Frost

House·28 against party

12.3% R

Chris Worrell

House·26 against party

11.6% D

Donnie Berthiaume

House·25 against party

10.9% R

Steve Xiarhos

House·24 against party

10.6% R

Priscila Sousa

House·22 against party

9.8% D

Dave Vieira

House·22 against party

9.5% R

Vanna Howard

Senate·11 against party

8.9% D

Lindsay Sabadosa

House·19 against party

8.8% D

Party cohesion

Party Voting Unity

Most Contentious Votes

An Act promoting transparency and public access in state government

An Act promoting rule of law, oversight, trust and equal constitutional treatment

An Act making appropriations for the fiscal year 2026 for the maintenance of the departments, boards, commissions, institutions, and certain activities of the commonwealth, for interest, sinking fund, and serial bond requirements, and for certain permanent improvements

An Act making appropriations for the fiscal year 2027 for the maintenance of the departments, boards, commissions, institutions, and certain activities of the commonwealth, for interest, sinking fund, and serial bond requirements, and for certain permanent improvements

An Act strengthening health care protections in the Commonwealth

An Act making appropriations for the fiscal year 2026 for the maintenance of the departments, boards, commissions, institutions, and certain activities of the commonwealth, for interest, sinking fund, and serial bond requirements, and for certain permanent improvements

An Act making appropriations for the fiscal year 2026 for the maintenance of the departments, boards, commissions, institutions and certain activities of the Commonwealth, for interest, sinking fund and serial bond requirements, and for certain permanent improvements

An Act relative to teacher preparation and student literacy.

An Act to promote student learning and mental health

An Act relative to teacher preparation and student literacy.

Crossed the Aisle