Bill Ackman Endorses Andrew Cuomo for NYC Mayor, Calls Mamdani "Inauthentic" After Debate

Prominent hedge fund manager Bill Ackman has publicly thrown his support behind former Governor Andrew Cuomo for New York City Mayor following a recent debate, sharply criticizing Democratic nominee Zohran Mamdani as "completely full of it." In a social media post dated October 18, 2025, Ackman lauded the debate moderators for their "excellent questions" and urged New Yorkers to watch the proceedings. The commentary comes amidst a closely watched and contentious mayoral race for the 2025 election.

Ackman's most pointed criticism was directed at State Assemblymember Zohran Mamdani, describing him as exuding "inauthenticity and smugness." The investor stated, "The whole thing is an act. Just look at the identical practiced smile with which he ends each answer," adding that Mamdani "denies or disavows any of his previous public statements that he knows will now cost him votes." Mamdani, a democratic socialist who secured the Democratic nomination after a surprising primary victory over Cuomo, has faced scrutiny from the business community, with some executives expressing alarm over his progressive policy proposals.

Regarding Republican candidate Curtis Sliwa, Ackman acknowledged him as a "good man who cares and knows a lot about the City." However, he urged Sliwa to withdraw from the race, asserting that "A vote for Sliwa is a vote for Mamdani" and that Sliwa's continued candidacy would "hand NYC to Mamdani." Sliwa, known for founding the Guardian Angels, is making his second bid for mayor, focusing on public safety and crime.

Conversely, Ackman offered a strong endorsement for Andrew Cuomo, stating, "Cuomo had a great debate. He was knowledgeable, practical and full of common sense." The former governor, who is running as an independent after losing the Democratic primary to Mamdani, was praised by Ackman for having "his mojo back" and for "attacking Mamdani for his lies and providing credible solutions." Cuomo's campaign has emphasized his extensive experience in government and his ability to address the city's challenges.

The 2025 New York City mayoral election features a competitive general election, with Mamdani, Cuomo, and Sliwa as the leading candidates. Recent polls indicate Mamdani holds a lead, though Cuomo has been attempting to close the gap. The debate highlighted stark ideological differences, particularly on issues like affordability, public safety, and the city's relationship with figures like President Donald Trump.