09/08/2026
IS THE MASSACHUSETTS SENATE ABOUT TO MOVE LEFT — AND WHAT WOULD THAT ACTUALLY CHANGE?
The Massachusetts Senate could look considerably different when the next legislative session begins — and the changes may give the chamber’s progressive wing more influence over both policy and how business gets done on Beacon Hill.
Recent Democratic primary results, combined with retirements and potentially one still-unresolved race, are changing the composition of a Senate where President Karen Spilka has exercised substantial leadership power.
Axios Boston reports that Spilka is losing several experienced senators who have played important roles within Senate leadership, while newly elected or incoming lawmakers could strengthen the chamber’s progressive bloc. (Axios)
Among the changes:
Sen. Pat Jehlen, a longtime progressive senator representing Somerville and surrounding communities, is retiring.
Sen. Mike Rush, the Senate Majority Whip and an important member of leadership, lost his Democratic primary to progressive challenger Persis Yu. (BostonGlobe.com)
And Democratic Socialist state Rep. Erika Uyterhoeven won the Democratic primary for Jehlen’s open Senate district covering Somerville, Medford and parts of Cambridge. WBUR reported that she defeated several candidates, including a more institutional progressive backed by Jehlen and Gov. Maura Healey. (WBUR)
Meanwhile, the political future of Senate President Pro Tempore Will Brownsberger, one of the Senate’s highest-ranking members, remains unresolved in an extraordinarily close contest with challenger Daniel Lander. A recount is underway, so no final result should yet be assumed. (BostonGlobe.com)
WHAT COULD ACTUALLY CHANGE?
Changing senators doesn’t automatically change Massachusetts law.
But a larger and more assertive progressive bloc could affect which proposals receive sustained attention and how much pressure Senate leadership faces to bring legislation forward.
Among the issues Axios identifies as potentially benefiting from the changing Senate are rent stabilization and Medicare for All. (Axios)
Housing could be particularly important.
Boston Mayor Michelle Wu has repeatedly encountered resistance in the Senate to some of her housing and tax proposals. Two recent Senate primaries involving Brownsberger and Sen. Nick Collins became intertwined with disagreements over Wu’s proposal to temporarily shift more of Boston’s property-tax burden from residential taxpayers to commercial properties. Collins won his primary, while the Brownsberger race remains subject to recount proceedings. (BostonGlobe.com)
THE FIGHT MAY ALSO BE ABOUT HOW BEACON HILL OPERATES
The potential change is not limited to policy.
Some incoming lawmakers campaigned on changing the Legislature’s internal culture, including the concentration of power among leadership and committee chairs.
Axios reports that new members are expected to push for changes in legislative process and decision-making, potentially giving rank-and-file senators a stronger voice. (Axios)
That matters because Massachusetts has long faced criticism over the Legislature’s transparency and the amount of authority concentrated in leadership.
A more independent progressive bloc could therefore create debates over two different questions:
What policies should Massachusetts enact?
And:
Who inside the Legislature gets to decide which proposals actually receive votes?
WHAT TO WATCH IN 2027
The real test will come after the new Senate takes office.
Will progressive priorities such as rent stabilization or expanded government-backed healthcare move further?
Will tax policy change?
Will committee procedures become more transparent?
Will individual senators obtain more influence relative to Senate leadership?
Or will the institutional structure of Beacon Hill prove stronger than the ideological changes produced by one election cycle?
Those questions will determine whether Massachusetts is witnessing simply a change in personalities — or the beginning of a meaningful shift in the direction and operation of the State Senate.
Massachusetts South Shore Progressives