A big-time NYC real estate developer slammed Mayor Zohran Mamdani over his “ugly” political stunt outside Citadel CEO Ken Griffin’s apartment touting his pledge to tax the rich, The Post has learned. “Ken is the one who can galvanize the business community,” Vornado honcho Steve Roth said on the earnings call Tuesday morning, according to a transcript. “I would be first in line to support him. The ugly, unnecessary video stunt is personal to Ken and sort of personal to me too.” A big-time NYC real estate developer slammed Mayor Zohran Mamdani over his “ugly” political stunt outside Citadel CEO Ken Griffin’s apartment touting his pledge to tax the rich, The Post has learned. X/Mayor Zohran Kwame Mamdani “Ken is the one who can galvanize the business community,” Vornado honcho Steve Roth said on the earnings call Tuesday morning, according to a transcript.…