DemocratIn office since Nov 2022

James Arena-DeRosa

Massachusetts State Representative, District 66 since 2022. Ran in 2 elections between 2022 and 2024, winning 2. Re-elected in 2026. Next on the ballot in 2028.

Massachusetts State Representative, District 66

Official website Wikipedia

In office: 3 yrs; Since 2022
Bills became law: 3; 29 sponsored, 2025–2026 session
Votes missed: 0.0%; Chamber median 0.9%
With party: 100%; On votes splitting the parties
Last margin: +30.0; Won 2022
Next election: 2028; Nov 7, 2028

Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:51 PM ET

Committees

As of 2026-10.

Agriculture and Fisheries
Housing
Public Service
Veterans and Federal Affairs

Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET

Legislation

2025–2026 session · 29 sponsored · 3 became law

BillIntroCmteHouseSenateLaw

H 3608 An Act designating a certain bridge in the town of Hopkinton as the Major General Frank D. Merrill memorial…
Became law Oct 2026

H 4293 An Act establishing an economic development special revenue account for the town of Hopkinton
Became law Aug 2026

H 4292 An Act amending the charter of the town of Hopkinton to incorporate appointment powers of the board of…
Became law Mar 2026

H 4605 An Act authorizing the town of Millis to establish a means-tested senior citizen property tax exemption for…
Vetoed Oct 2026

H 5526 An Act authorizing the town of Holliston to establish a means-tested senior citizen property tax exemption…
Failed in the House Aug 2026

Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET

Voting record

2025–2026 session · placement by roll-call votes

Where Arena-DeRosa sits in the Massachusetts House of Representatives

Arena-DeRosa is closer to the center than 11% of the chamber's Democrats.

Closest: Jay Livingstone, Jessica Giannino, Kristin Kassner

Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:51 PM ET

With Arena-DeRosa’s party

Votes with the chamber's Democrats100%
Cosponsorships of the other party's bills8%

Black tick: the average of Democrats in the Massachusetts House of Representatives.

Source: 99chambers legislative scores from roll calls and cosponsorships

Key votes

Votes chosen for their effect, not their side: Arena-DeRosa’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.

Date	Bill	Arena-DeRosa	Dem. majority	Rep. majority	Result
Jul 22, 2026	H 5595: An Act prioritizing patient access to care	Yes	Yes	No	Passed 119–33
Jul 8, 2026	H 5562: An Act relative to economic development in the commonwealth	Yes	Yes	Yes	Passed 145–6
Jul 1, 2026	H 5555: An Act making appropriations for the fiscal year 2027 for the maintenance of the…	Yes	Yes	Yes	Passed 142–6
Jun 10, 2026	S 2726: An Act regarding free expression	No	No	Yes	Failed 23–133
Apr 28, 2026	H 5500: An Act making appropriations for the fiscal year 2027 for the maintenance of the…	Yes	Yes	No	Passed 136–20

Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls

Career

Offices held, and every time Arena-DeRosa was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.

2022202320242025202620272028Massachusetts House of Representatives, District 66

Source: 99chambers results archive (MEDSL, Klarner, state election offices)

Elections

Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.

Year	Race	Result	Margin	Seat	+/−
2026	Massachusetts House of Representatives, District 66	Won	—	D+38.2	—
2024	Massachusetts House of Representatives, District 66	Won	—	D+38.2	—
2022	Massachusetts House of Representatives, District 66	Won	D+30.0	D+42.1	−12.1