Lefty upstart Zohran Mamdani has leapfrogged over former Gov. Andrew Cuomo in the city’s ranked choice Democratic primary for mayor, according to a stunning new poll released Monday.

In its hypothetical initial round of voting, Cuomo’s lead shrinks to 3 percentage points, with 35% of likely Democratic voters supporting him compared to 32% for Mamdani and 13% for city Comptroller Brad Lander, the Emerson College Polling/Pix 11/The Hill survey found.

City Council Speaker Adrienne Adams follows with 8%, Scott Stringer 3% and 5% split between candidates Zellnor Myrie, Whitney Tilson, Jessica Ramos and Michael Blake, with another 4% undecided.