Which organizations endorsed Mahmood Mamdani and why did they support him?

1. Who the endorsements in these sources actually apply to — father or son?

Reporting in the provided results focuses on Zohran Mamdani’s 2025 New York mayoral campaign; endorsements listed in news stories and organizational pages—Bernie Sanders, AOC, Kathy Hochul, Hakeem Jeffries, unions and StreetsPAC—are explicitly presented as backing Zohran, the candidate who won the mayoral race, not Mahmood Mamdani the academic ^{[1] [8] [2] [3] [5]}. Mahmood Mamdani is profiled in biographical sources (Wikipedia) that do not list political endorsements of him by organizations in the supplied dataset ^{[6] [7]}. Available sources do not mention organizations endorsing Mahmood Mamdani directly ^[6].

2. National progressive endorsements and why they backed Zohran

National progressive figures named in the reporting—Senator Bernie Sanders and Representative Alexandria Ocasio‑Cortez—appeared with and backed Zohran Mamdani because his platform aligned with progressive priorities: housing, cost of living relief, labor and public‑services expansions. The Guardian and Time emphasize that progressive national support helped amplify Mamdani’s momentum, framing him as a democratic‑socialist alternative to more centrist figures ^{[1] [8]}. Those sources attribute the endorsements to ideological alignment and grassroots energy rather than to the senior Mamdani ^{[1] [8]}.

3. State and congressional endorsements: consolidation and party politics

New York state leaders—Governor Kathy Hochul, Assembly Speaker Carl Heastie and Senate Majority Leader Andrea Stewart‑Cousins—are reported as having endorsed Zohran, with Hakeem Jeffries’s October endorsement ending a period of high‑profile hesitation among city and national Democrats ^[2]. Coverage in Time and The Guardian frames these endorsements as efforts to consolidate Democratic backing ahead of the general election and to avoid a fractious split that could help opponents ^{[8] [1] [2]}. Some prominent Democrats, like Senators Chuck Schumer and Kirsten Gillibrand, notably did not immediately endorse, and sources document internal debate within the party ^{[8] [1]}.

4. Labor unions and local political groups: programmatic reasons

Several unions publicly endorsed Zohran Mamdani: 32BJ SEIU and the Hotel and Gaming Trades Council (both reported as switching from prior Cuomo support), and the United Federation of Teachers’ delegate assembly later voted to endorse him; StreetsPAC also posted an explicit endorsement ^{[3] [4] [5]}. Union leaders cited Mamdani’s pledges on wages, cost reduction measures, and pro‑worker policies—his “vision that put working people of New York front and center” and his grassroots organizing style—as reasons for support ^{[3] [4] [5]}.

5. Media and fact‑checking about unlikely endorsements

After the election, a social‑media claim circulated that the Islamic State had “endorsed” Mamdani; Snopes investigated and found no verifiable evidence that ISIS formally endorsed him and noted such a claim was unlikely and unverified in accessible channels ^[9]. This illustrates how some post‑election narratives attempted to link the candidate to extremist actors despite no credible sourcing in the provided materials ^[9].

6. What the sources do not say about Mahmood Mamdani

The supplied biographies of Mahmood Mamdani (Columbia professor) profile his academic career and family ties but do not list organizational political endorsements of him; those documents instead contextualize his son’s political rise ^{[6] [7]}. Available sources do not mention organizations endorsing Mahmood Mamdani personally or explain motives for such support—if any—so any claim about institutional endorsements of Mahmood is unsupported in the provided reporting ^{[6] [7]}.

7. Bottom line and reporting limitations

The reporting and documents provided attribute a broad coalition of progressive politicians, state leaders and labor organizations endorsing Zohran Mamdani for mayor—motivations cited include ideological alignment, pro‑worker policy promises, grassroots organizing and party consolidation—but do not show those organizations endorsing Mahmood Mamdani, the academic ^{[1] [8] [3] [4] [5] [6]}. If you are asking specifically about endorsements of Mahmood Mamdani rather than Zohran, available sources do not mention any organizational endorsements of him ^{[6] [7]}.