Nonpartisan · Data from OpenStates / Plural Policy · Massachusetts
Democratic
· Representative
Dan Sena
Represents District 37th Middlesex in the House of Representatives.
Votes with Democrats
100%
on 96 party-line votes · House Democrats median 100%
Cast a vote
98%
Yea or Nay on 257 of 263 roll calls · House median 98%
Their bills that became law
2 of 31
as a primary sponsor, this session · Democrats median 1
Roll calls on record
263
194th General Court
Votes and bills updated Oct 10, 2026 from LegiScan (CC BY 4.0), which republishes the legislature’s own records. Profile details from OpenStates / Plural Policy. Figures cover 194th General Court.
How Dan Sena votes
A party-line vote is a roll call where most voting Democrats and most voting Republicans took opposite sides. Absences and not-voting are never counted. Same method as our Congress pages.
Where Dan Sena sits in the House
Each dot is one member of the House, placed by how often they voted on the Democratic side of party-line votes. Dan Sena is circled.
Always on the Republican sideAlways on the Democratic side
Times they broke with their party
0 of 96 party-line votes.
They voted with most Democrats on every party-line vote this session.
Closest votes they cast
Roll calls decided by the fewest votes, one per bill.
H5595 · Prioritizing patient access to care
House Enacted – 121 YEAS to 35 NAYS · 2026-07-31 · Passed 119–35
H5500 · 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
House Amendment 1334 rejected – 30 YEAS to 123 NAYS · 2026-04-27 · Failed 30–118
H4000 · 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
House Amendment 311 rejected – 30 YEAS to 126 NAYS · 2025-04-29 · Failed 30–126
H5469 · Promoting transparency and public access in state government
House Passed to be engrossed – 125 YEAS to 28 NAYS · 2026-06-03 · Passed 125–28
S2543 · Strengthening health care protections in the Commonwealth
House Amendment 8 rejected – 30 YEAS to 129 NAYS · 2025-07-16 · Failed 30–129
Republicans they vote with most
Share of contested roll calls (the losing side got at least 10%) where both voted and landed on the same side. Unanimous votes are left out, because on those everyone agrees.
Dave VieiraRepublican · District 3rd Barnstable · 89 shared contested votes
15%
Brad JonesRepublican · District 20th Middlesex · 90 shared contested votes
13%
Donald WongRepublican · District 9th Essex · 90 shared contested votes
13%
Their session, month by month
Dark bars are roll calls they were recorded on each month; the red part is the ones without a Yea or Nay (6 in all). Gaps are months the chamber wasn’t voting.
← Massachusetts Delegation
YeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaAbsentYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaNayNayYeaYea
Their bills, from filing to law
Bills Dan Sena was a primary sponsor of this session. Most bills from either party never leave committee; in Illinois many never get past the Assignments or Rules committee.
Introduced31
Out of committee3
Passed one chamber3
Passed both chambers2
Became law2
Never left committee28
For comparison, the median Democratic member of the House has 1 bills that became law this session.
Relative to the retirement classification of Crystal Swinimer's, an employee of the Middlesex county sheriff's office
Relative to the retirement classification of Crystal Swinimer, an employee of the Middlesex county sheriff's office. Public Service.
Not out of committeeAccompanied a new draft, see H5682 · 2026-10-01
Relative to the Ayer Library
Relative to the Ayer Library in the town of Ayer. Municipalities and Regional Government. [Local Approval Received.]
Passed one chamberReferred to the House Committee on Bills in the Third Reading · 2026-09-24
Authorizing the town of Ayer to prohibit the use or sale of second-generation anti-coagulant rodenticides
That the town of Ayer be authorized to prohibit the use or sale of second-generation anti-coagulant rodenticides in said town. Environment and Natural Resources. [Local Approval Received.]
Not out of committeeBill reported favorably by committee and referred to the committee on House Steering, Policy and Scheduling · 2026-07-31
Authorizing the town of Boxborough to prohibit the use or sale of second-generation anti-coagulant rodenticides
That the town of Boxborough be authorized to prohibit the use or sale of second-generation anti-coagulant rodenticides in said town. Environment and Natural Resources. [Local Approval Received.]
Not out of committeeBill reported favorably by committee and referred to the committee on House Steering, Policy and Scheduling · 2026-07-31
Relative to the military family advocacy program, domestic violence and child abuse and neglect
Relative to the military family advocacy program, domestic violence and child abuse and neglect. Veterans and Federal Affairs.
Not out of committeeAccompanied a study order, see H5466 (under House Rule 27) · 2026-06-01
Establishing a sick leave bank for Richard Curley, an employee of the Middlesex Sheriff’s Office
For legislation to establish a sick leave bank for Richard Curley, an employee of the Middlesex Sheriff’s Office. Public Service.
Not out of committeeAccompanied a study order, see H5393 · 2026-05-11
Requiring nonlead ammunition when taking wildlife
Relative to requiring lead free ammunition when taking wildlife. Environment and Natural Resources.
Not out of committeeAccompanied a study order, see H5307 · 2026-03-30
Relative to the commonwealth's fire departments
Relative to benefits for certain firefighters. Public Service.
Not out of committeeAccompanied a study order, see H5312 (under House Rule 27) · 2026-03-30
Promoting drinking water quality for all
Relative to the quality of drinking water from private wells. Environment and Natural Resources.
Not out of committeeAccompanied a study order, see H5307 · 2026-03-30
Relative to civil asset forfeiture transparency and data reporting
Relative to civil asset forfeiture transparency and data reporting. The Judiciary.
Not out of committeeAccompanied a study order, see H5281 (under House Rule 27) · 2026-03-26
Granting the town of Acton the authority to provide legal voting rights in municipal elections for town residents aged 16 and 17 years old
That the town of Acton be authorized to grant legal voting rights in municipal elections to town residents aged 16 and 17 years old. Election Laws. [Local Approval Received.]
Not out of committeeAccompanied a study order, see H5253 (under House Rule 27) · 2026-03-19
Relative to public safety around hospitals with air emergency helipads
Relative to aircraft flight training maneuver public safety around hospitals with air emergency helipads. Public Safety and Homeland Security.
Not out of committeeAccompanied a study order, see H5254 (under House Rule 27) · 2026-03-19
Relative to ranked choice voting in the town of Acton
Relative to ranked choice voting in the town of Acton. Election Laws. [Local Approval Received.]
Not out of committeeAccompanied a study order, see H5253 (under House Rule 27) · 2026-03-19
Establishing a fetal alcohol spectrum disorders program
For legislation to establish a fetal alcohol spectrum disorders program within the Department of Public Health. Public Health.
Not out of committeeAccompanied a study order, see H5234 · 2026-03-16
Relative to increased protection of wildlife management areas
Relative to increased protection of wildlife management areas. Environment and Natural Resources.
Not out of committeeAccompanied a new draft, see H5216 · 2026-03-12
Descriptions are the legislature’s own synopsis. Bill data from LegiScan, CC BY 4.0.
Loading committees…
H5624 · 2026-07-31
Establishing a Medal of Fidelity license plate (House Passed to be engrossed – 156 YEAS to 0 NAYS)
H5627 · 2026-07-31
To improve Massachusetts home care (House Committee of conference report accepted – 153 YEAS to 0 NAYS)
H5631 · 2026-07-31
Mandating access to cancer screenings for firefighters through health care benefits plans or programs provided by the public employer (House Passed to be engrossed – 154 YEAS to 0 NAYS)
S2726 · 2026-07-31
Regarding free expression (House Enacted – 156 YEAS to 1 NAYS)
H5531 · 2026-07-31
Relative to James J. O'Neil Park (House Enacted – 157 YEAS to 0 NAYS)
H5595 · 2026-07-31
Prioritizing patient access to care (House Enacted – 121 YEAS to 35 NAYS)
S2653 · 2026-07-31
Updating the Move Over Law (House Passed to be engrossed – 157 YEAS to 0 NAYS)
H5629 · 2026-07-31
Enhancing child welfare protections (House Committee of conference report accepted – 157 YEAS to 0 NAYS)
S3236 · 2026-07-31
Authorizing the Massachusetts Department of Fish and Game to convey easements over certain parcels of land (House Enacted – 152 YEAS to 0 NAYS)
S3237 · 2026-07-31
Authorizing the town of Bourne to convey a right-of-way and easement (House Enacted – 151 YEAS to 0 NAYS)
H5627 · 2026-07-31
To improve Massachusetts home care (House Enacted – 157 YEAS to 0 NAYS)
S3235 · 2026-07-31
Relative to the Pilgrim Memorial Park in Plymouth (House Enacted – 152 YEAS to 0 NAYS)
H5639 · 2026-07-31
Authorizing the town of Nantucket conservation commission to convey a certain parcel of land situated in the town for purposes of conveyance to the town of Nantucket under the care, custody, management and control of the select board and the town of Nantucket to convey certain land in the town of Nantucket held for open space, passive recreation or conservation purposes to the Nantucket Islands Land Bank for the purposes pursuant to its enabling legislation for open space, conservation and passive recreation purposes (House Enacted – 151 YEAS to 0 NAYS)
S2968 · 2026-07-31
Authorizing the Commonwealth of Massachusetts, acting by and through its Division of Capital Asset Management and Maintenance, to grant permanent easements over certain land in the town of Milton for highway purposes (House Enacted – 152 YEAS to 0 NAYS)
H5640 · 2026-07-31
Authorizing the town of Hingham to grant to the commonwealth of Massachusetts certain parcels of land in the town of Hingham for highway purposes (House Enacted – 152 YEAS to 0 NAYS)
S3188 · 2026-07-31
Authorizing the Buzzards Bay Water District to convey non-exclusive easements over a certain parcel of land (House Enacted – 152 YEAS to 0 NAYS)
S3230 · 2026-07-31
Authorizing the Massachusetts Department of Transportation to acquire interests in certain portions of land owned by the town of Andover which were acquired by the town for Article XCVII purposes (House Enacted – 152 YEAS to 0 NAYS)
H5463 · 2026-07-30
Relative to a conservation restriction in the town of Middleton (House Enacted – 156 YEAS to 0 NAYS)
H5492 · 2026-07-30
Authorizing the town of Billerica to transfer control of certain land in the town of Billerica for the Yankee Doodle Bike Path (House Enacted – 156 YEAS to 0 NAYS)
H5620 · 2026-07-30
Promoting rule of law, oversight, trust and equal constitutional treatment (House Committee of conference report accepted – 136 YEAS to 21 NAYS)
H5620 · 2026-07-30
Promoting rule of law, oversight, trust and equal constitutional treatment (House Quorum Roll Call – 149 YEAS to 0 NAYS)
H5620 · 2026-07-30
Promoting rule of law, oversight, trust and equal constitutional treatment (House Enacted – 135 YEAS to 21 NAYS)
H5614 · 2026-07-30
Authorizing the release or exclusion of certain land from conservation restrictions in the town of Deerfield (House Enacted – 157 YEAS to 0 NAYS)
H5616 · 2026-07-30
Authorizing the Massachusetts Department of Transportation to take easements over certain land located in the city of Woburn and the town of Burlington held in trust by the city of Boston for the Mary P. C. Cummings Testamentary Trust for highway purposes (House Enacted – 158 YEAS to 0 NAYS)
S3160 · 2026-07-30
Relative to the dissolution of the Holmes Park Water District (House Enacted – 158 YEAS to 0 NAYS)
H5467 · 2026-07-30
Authorizing the transfer of certain parcels of land in the town of Weston from the Weston conservation commission to the select board (House Enacted – 158 YEAS to 0 NAYS)
H4992 · 2026-07-30
Authorizing the Barnstable county and the town of Bourne to convey certain parcels of land and certain interests in land in the town of Bourne (House Enacted – 158 YEAS to 0 NAYS)
S3141 · 2026-07-30
Relative to primary care for you (House Consolidated amendment A adopted – 158 YEAS to 0 NAYS)
S3141 · 2026-07-30
Relative to primary care for you (House Passed to be engrossed – 158 YEAS to 0 NAYS)
S3052 · 2026-07-29
Authorizing the town of Dighton to use a portion of conservation land for public way purposes. (House Enacted – 157 YEAS to 0 NAYS)
H5621 · 2026-07-29
To improve care and prepare for the new era of Alzheimer’s and dementia (House Passed to be engrossed – 156 YEAS to 0 NAYS)
H5379 · 2026-07-29
Relating to the transfer of interest in land in West Brookfield (House Enacted – 156 YEAS to 0 NAYS)
H5561 · 2026-07-29
Authorizing the commissioner of capital asset management and maintenance to transfer certain parcels of land in the town of Norton (House Enacted – 156 YEAS to 0 NAYS)
H5612 · 2026-07-29
Relative to home care services (House Passed to be engrossed – 157 YEAS to 0 NAYS)
H5388 · 2026-07-22
Authorizing the transfer of a certain parcel of land in the town of Marion from the Open Space Acquisition Commission to the Select Board (House Enacted – 154 YEAS to 0 NAYS)
H5595 · 2026-07-22
Prioritizing patient access to care (House Passed to be engrossed – 119 YEAS to 33 NAYS)
S2735 · 2026-07-22
Dissolving the North Carver water district (House Enacted – 153 YEAS to 0 NAYS)
S3028 · 2026-07-15
Promoting pet equity, treatment and safety (House Passed to be engrossed – 151 YEAS to 1 NAYS)
H2250 · 2026-07-15
Dissolving the Whately Water District (House Enacted – 153 YEAS to 0 NAYS)
H5569 · 2026-07-08
Relative to property tax classifications in the city of Watertown for fiscal year 2027 and subsequent fiscal years (House Passed to be engrossed – 145 YEAS to 0 NAYS)
H5562 · 2026-07-08
Relative to economic development in the commonwealth (House Consolidated amendment A adopted – 144 YEAS to 6 NAYS)
H5562 · 2026-07-08
Relative to economic development in the commonwealth (House Consolidated amendment B adopted – 150 YEAS to 0 NAYS)
H5562 · 2026-07-08
Relative to economic development in the commonwealth (House Consolidated amendment C adopted – 151 YEAS to 0 NAYS)
H5562 · 2026-07-08
Relative to economic development in the commonwealth (House Consolidated amendment D adopted – 150 YEAS to 0 NAYS)
H5562 · 2026-07-08
Relative to economic development in the commonwealth (House Consolidated amendment E adopted – 149 YEAS to 0 NAYS)
H5562 · 2026-07-08
Relative to economic development in the commonwealth (House Passed to be engrossed – 148 YEAS to 2 NAYS)
H5576 · 2026-07-08
Relative to economic development in the commonwealth (House Passed to be engrossed – 148 YEAS to 2 NAYS)
H5555 · 2026-07-01
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 (House Committee of conference report accepted – 142 YEAS to 6 NAYS)
S2916 · 2026-07-01
Improving campaign finance reporting for statewide ballot questions (House Passed to be engrossed -149 YEAS to 0 NAYS)
S3106 · 2026-07-01
Relative to toxic-free medical devices (House Passed to be engrossed -139 YEAS to 0 NAYS)
H5555 · 2026-07-01
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 (House Enacted – 142 YEAS to 6 NAYS)
H5511 · 2026-06-17
Relative to teacher preparation and student literacy (House Committee of conference report accepted – 153 YEAS to 0 NAYS)
S3064 · 2026-06-17
To build resilience for Massachusetts communities (House Consolidated amendment A adopted – 153 YEAS to 0 NAYS)
S3064 · 2026-06-17
To build resilience for Massachusetts communities (House Consolidated amendment B adopted – 152 YEAS to 0 NAYS)
S3064 · 2026-06-17
To build resilience for Massachusetts communities (House Passed to be engrossed – 151 YEAS to 0 NAYS)
H5491 · 2026-06-10
Implementing the recommendations of the Walsh-Kennedy Commission Report (House Passed to be engrossed – 155 YEAS to 0 NAYS)
S2726 · 2026-06-10
Regarding free expression (House Amendment 3 rejected – 2 YEAS to 154 NAYS)
S2726 · 2026-06-10
Regarding free expression (House Amendment 4 rejected – 23 YEAS to 133 NAYS)
S2726 · 2026-06-10
Regarding free expression (House Passed to be engrossed – 153 YEAS to 3 NAYS)
S1646 · 2026-06-10
Relative to violation of regulation regarding hot work processes (House Passed to be engrossed – 156 YEAS to 0 NAYS)
Complete voting record from LegiScan (showing the 60 most recent of 263 total roll-call votes this session).
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