New York Democratic Chairman Won’t Endorse Mamdani for Mayor NYT | Top Stories By: Nicholas Fandos and Benjamin Oreskes 19 September 2025 at 03:54 The decision by Jay Jacobs, the party chairman, puts him at odds with Democratic primary voters and New York’s governor. © Dave Sanders for The New York TimesJay Jacobs, who leads the state Democratic Party, is said to have told associates in recent days that he would sooner resign as chairman than support Zohran Mamdani, the Democratic mayoral nominee in New York City.