She’s the power behind the red curtain.

Zohran Mamdani’s secretive newly named chief of staff Elle Bisgaard-Church is a Democratic Socialists of America true believer who convinced the far-left group to back him for mayor and helped craft his “Department of Community Safety,” insiders said.

The two 34-year-olds forged similar paths to the heights of New York City political power — cutting their teeth in antiwar and pro-Palestinian college campus activism and toiling in lefty nonprofits before making the leap into state government.

“Few have played a more central role in this movement, or in every victory we have achieved together in the Assembly, than Elle,” Mamdani gushed Monday, with Bisgaard-Church standing serenely by his side — as he announced her elevation to City Hall chief of

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