Mayor-elect Zohran Mamdani showed wisdom in asking Jessica Tisch to stay on as police commissioner , and her decision to stay on offers much hope for the city. The challenge now is for the new mayor not to undermine her, despite their deep differences on matters of principle. Tisch has done a remarkable job overseeing the NYPD since her appointment a year ago. On her watch, the department’s been shattering records in fighting crime. This year, murders — at 275 as of Sunday, down a stunning 21%