Zohran Mamdani, the 33-year-old democratic socialist who shocked the political establishment by trouncing ex-Gov. Andrew M. Cuomo, 67, in New York City’s Democratic mayoral primary, has won the race by 12 points, with 56% of ranked-choice votes to Cuomo’s 44%, according to results posted Tuesday by the Board of Elections. The tabulations were disclosed at noon.

Citywide primaries are run by ranked choice: Voters list their preferred candidates from first up to fifth, and if no candidate gets over 50% of top picks, the tabulations go in rounds until one candidate has over 50% and is declared the winner. At the end of each round, the computer eliminates the last-place finisher and voters’ picks are counted for their next choice.

Mamdani won in the third round by 12 percentage points and 116,804 votes. By comparison, Eric Adams’ margin of victory four years ago, when the comparable tabulations were run in 2021, was barely 1 percentage point, or 8,426 votes, in the eighth round. Mamdani got more voters in a Democratic primary — 545,334 — than any mayoral candidate since 1989, according to political writer and strategist Michael Lange.

Although Mamdani’s support on first-choice ballots didn’t surpass 50% in primary election night results, it was mathematically near impossible for anyone else to win based on the Board of Elections data. Mamdani, a state assemblyman representing Astoria, Queens, got 43.51% of the first-choice vote. Cuomo, the former governor who resigned in 2021 in scandal, secured 36.42%. Brad Lander, the city comptroller, got 11.31%. Lander and Mamdani cross-endorsed each other, so Lander voters are likely to have ranked Mamdani second.

Mamdani spokesman Andrew Epstein texted a statement from the nominee: "Last Tuesday, Democrats spoke in a clear voice, delivering a mandate for an affordable city, a politics of the future, and a leader unafraid to fight back against rising authoritarianism. I am humbled by the support of more than 545,000 New Yorkers who voted for our campaign and am excited to expand this coalition even further as we defeat Eric Adams and win a city government that puts working people first."

In an emailed statement, Cuomo spokesman Rich Azzopardi said: "Extremism, division and empty promises are not the answer to this city’s problems, and while this was a look at what motivates a slice of our primary electorate, it does not represent the majority."

The primary will be certified mid-month. The general election is Nov. 4, and Mamdani will face the Republican nominee, Guardian Angels founder and talk radio host Curtis Sliwa, as well as Adams, who is running as an independent, and lawyer Jim Walden, also an independent. Cuomo had until Friday to remove himself from the ballot as an independent but didn't do so as of the deadline. He hasn't announced whether he'll actually campaign.

Mamdani dethroned a political dynasty in Cuomo, son of a former governor and ex-husband of a Kennedy. In seeking a political comeback, Cuomo was ahead in almost every independent opinion poll until late in the race and had the support of corporations and billionaires who poured millions into trying to help him win.

Mamdani has promised to make New York City more affordable for more residents, including by making public buses and child care free; opening one municipal-run grocery store in each borough; and imposing a rent freeze on regulated apartments. His social programs would be paid for with a tax on the richest New Yorkers and big corporations, though tax hikes need to be greenlighted by the state.

Asked Tuesday about Mamdani’s promises to defy federal immigration enforcers, President Donald Trump threatened Mamdani, an Indian Ugandan who briefly lived in South Africa and came to America at age 7 and was naturalized in 2018.

"Well, then we’ll have to arrest him. Look, we don’t need a communist in this country, but if we have one, I’m gonna be watching over him very carefully," Trump said.

Trump said he would have "a lot of fun" with Mamdani, and "a lot of people are saying he’s here illegally."

Mamdani's statement said Trump's remarks "don’t just represent an attack on our democracy but an attempt to send a message to every New Yorker who refuses to hide in the shadows: If you speak up, they will come for you. We will not accept this intimidation," and city voters would reject it in the election.

Trump made his comments at a tour of an immigration detention facility in the Florida Everglades nicknamed the "Alligator Alcatraz."