As New York City woke up to a new mayor-elect on Wednesday, Jewish groups that spurned Zohran Mamdani faced a decision — how to react to a leader whose staunch criticism of Israel flew in the face of their core beliefs.

Their first responses ranged from despondent to optimistic, with aims from seeking unity to staging a battlefield.

Jonathan Greenblatt, the Anti-Defamation League chief who railed against Mamdani throughout the race, convened a briefing on Wednesday to discuss grappling with the new administration. He announced a “Mamdani Monitor,” a public tracker of Mamdani’s policies and personnel appointments that the ADL viewed as threatening Jewish security.

“We’re deeply concerned about what the next four years could augur for Jewish New Yorkers — the antisemitic language that he

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