City Hall building in the city of New York with trees on periphery.

Climate advocates unite behind Zohran Mamdani in New York City’s mayoral race

Grassroots climate organizers from Sunrise Movement to Third Act are pouring volunteers and money into Assemblyman Zohran Mamdani’s bid to become New York City’s next mayor.

Ryan Krugman reports for Inside Climate News.


In short:

  • Mamdani upset former governor Andrew Cuomo in June’s ranked-choice Democratic primary, buoyed by heat-wave canvassing that spotlighted his message of affordability and climate justice.
  • Sunrise NYC, New York Communities for Change and Climate Defiance have mobilized tens of thousands of calls, door-knocks and dollars, while Third Act targets older voters on Manhattan’s Upper West Side.
  • Party heavyweights such as Sen. Chuck Schumer and Gov. Kathy Hochul still withhold endorsements, underscoring a generational split between progressive climate voters and centrist Democratic leaders.

Key quote:

“Affordability is so intertwined with the climate movement."

— Michael Magazine, Sunrise NYC lead of elective partnerships

Why this matters:

New York’s next mayor will steer one of the world’s biggest municipal budgets at a moment when rising seas, lethal heat, and aging infrastructure converge on 8.5 million residents. Mamdani’s coalition argues that rent freezes, enforced building-emissions caps, and expanded bus service are not only social safety nets but also frontline climate strategy, linking wallet pressure to carbon pollution. Their campaign tests whether climate policy can be embedded in bread-and-butter issues compelling enough to sway both Gen Z tenants and fixed-income retirees.

Read more: New York City mayoral candidate Zohran Mamdani links climate action to affordability plan

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