First Deputy Mayor Randy Mastro resigned from his role Sunday, submitting a five-page letter to Mayor Eric Adams.

In the letter, Mastro pointed to Mayor-elect Zohran Mamdani’s transition plans as the reason for his decision.

“While I told the press months ago that ‘I will never work for a Socialist,’ the Mayor-elect's transition team needlessly included me (and you) last week on a list of 179 City Hall staffers it intends to replace on January 1, 2026,” Mastro wrote in the letter. “No need to have done so. We will be leaving City government together.”

He said his resignation will take effect just before midnight on Dec. 31.

Mastro joined the Adams administration in March after several deputy mayors resigned . His appointment came months after Adams’ unsuccessful attempt to make him

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