New Delhi, Nov. 6 -- New York City's business and finance elite - many of whom campaigned against Zohran Mamdani's mayoral bid - reacted to his historic victory with a mix of caution, congratulations, and calls for cooperation.

Billionaire hedge fund manager Bill Ackman, one of Zohran Mamdani's fiercest critics, struck a conciliatory tone following the Democrat's decisive mayoral victory.

In a post on X, Ackman wrote, "Now you have a big responsibility."

He expanded on the message the next day, saying he cares "enormously" about the city and acknowledging that Mamdani's win was "decisive."

"While I did not support Mamdani for mayor and have concerns about the unintended and negative consequences of his policies, I want to do everythin...