He’s in no Mam’s land.

Longtime state Democratic Party leader Jay Jacobs refused to back Zohran Mamdani for New York City mayor Thursday — and could step down over Gov. Kathy Hochul’s stab-in-the-back endorsement of the far-left pol, sources said.

Jacobs bucked Hochul in a pointed statement, saying he had unbridgeable differences with the Democratic nominee, while acknowledging that fear-mongering over the socialist’s ascendance was “wrong and a gross over-reaction.”

“Mr. Mamdani and I are in agreement that America’s greatest problem is the continued growth in income disparity in our nation. On how to address it – we fundamentally disagree,” his statement began.

“Furthermore, as I expressed to him directly, I strongly disagree with his views on the State of Israel, along with certain

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