Dark-horse socialist candidate Zohran Mamdani staged a stunning upset Tuesday night by knocking off former Gov. Andrew Cuomo in the Democratic mayoral primary.

“Tonight we made history,” Mamdani told supporters at his victory party after midnight. “In the words of Nelson Mandela, ‘It always seems impossible until it is done.’ My friends, we have done it. I will be your Democratic nominee for the mayor of New York City.”

The 33-year-old Queens assemblyman defied polls and expectations as he notched a likely insurmountable 7-point lead over Cuomo, the three-term governor who hoped to make a political comeback after resigning in disgrace in 2021.

“Tonight is his night. He deserved it, he won,” a seemingly shell-shocked Cuomo, 67, said as he conceded to Mamdani.

The first round of the ranked-choice voting contest had Mamdani ahead with 43.51% of votes, followed by Cuomo’s 36.42% and city Comptroller Brad Lander’s 11.31%, Board of Elections unofficial results show. Mamdani carried roughly 432,000 votes to Cuomo’s 362,000, the results show.

Assemblyman Zohran Mamdani has taken the lead in the New York City mayoral race, unofficial tallies show. Photo by Michael M. Santiago/Getty Images

The state lawmaker didn’t crack 50% of votes, so the contest will still be decided July 1 once the other rounds of ranked-choice votes are calculated.

But the first-round totals still put the avowed democratic socialist within sight of becoming New York City’s next mayor.

Cuomo conceded he lost the primary as he addressed his campaign’s watch party — and signaled he may not run in the November general election on an independent line, as widely assumed.

Cuomo delivered his concession speech at his mayoral primary election night event in New York City on June 24, 2025. John Angelillo/UPI/Shutterstock

Mamdani is surrounded by his mother Mira Nair and wife Rama Duwaji during his election night watch party. REUTERS

“Tonight was not our night,” Cuomo said, as he praised Mamdani’s grassroots campaign, which mobilized young, far-left voters with catchy campaign promises and slogans focusing on affordability.

“It’s affordability, stupid,” quipped longtime New York City political operative Kevin McCabe, in a reference to Bill Clinton, about the issue that decided the race.

A win by Mamdani is bound to have sweeping impacts beyond the Big Apple and signal the rising power of the Democrats’ progressive wing, especially over aging party stalwarts such as Cuomo.

His near-insurmountable lead hints he could be replicating what his backer and fellow progressive Rep. Alexandria Ocasio-Cortez did in 2018, as she ran as a charismatic outsider to topple entrenched Democrat Joe Crowley — only he did it across the whole city, a political veteran told The Post.

The New York Post front cover for June 25, 2025.

Workers dismantle the stage following New York City mayoral candidate Andrew Cuomo’s election-night watch party for the Democratic primary on June 24, 2025 in New York City. Getty Images

Cuomo could barely be seen actually on the campaign trail as he relied on his name recognition, backing of powerful unions and attacks against Mamdani’s thin legislative record and ample history of criticizing Israel.

The scandal-scarred ex-governor entered the race in March as the clear frontrunner, but saw his polling lead steadily chipped away by Mamdani, who waged a social media-friendly campaign heavy on proposed freebies — which he plans to pay for by hiking taxes on billionaires and businesses.

“He should’ve learned a lesson from the terrible, Rose Garden race that Joe Crowley ran against AOC. Like Crowley, Cuomo was arrogant and grossly underestimated his opponent,” said Democratic operative Ken Frydman.

Mamdani out greeting voters with Comptroller Brad Lander on primary day in Manhattan on June 24, 2025. Photo by Michael M. Santiago/Getty Images

Sources were baffled that Cuomo squandered a 40-point polling lead and that he only launched his field operation last week despite more than $25 million on hand between his own war chest and super PACs.

“All the money in the world and you don’t know how to spend it,” said one Dem source close to the campaign. 

Billionaire former Mayor Michael Bloomberg and his allies, along with a swath of business leaders, funneled money into Cuomo’s campaign and a powerful super PAC – Fix the City – that bombarded New Yorkers with anti-Mamdani ads in the runup to the primary.

Cuomo’s comeback was also imperiled by progressives urging voters to “Don’t Rank Evil Andrew” – or DREAM – on their ballots. 

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Even some moderate New Yorkers were wary about Cuomo – whose governorship was marked by bullying, cynical politicking and his utter inability to own up to mistakes, such as his handling of nursing homes during the COVID-19 pandemic – and sought to elevate city Council Speaker Adrienne Adams instead.

Mamdani taking a selfie with a primary voter in Manhattan on the morning of the primary. LP Media

While Cuomo remained cloistered and aloof from voters, Mamdani closed his campaign by walking the length of Manhattan and making chummy joint appearances with Lander, his cross-endorser.

He ran an energetic campaign that regularly churned out slick videos and distilled his message to easy-to-digest proposals like a rent freeze and free buses.

Younger voters who heavily skewed toward Mamdani came out in droves during early voting, while Cuomo appeared to bank on older voters turning up on Election Day itself.

But the weather didn’t cooperate as the hottest June day in New York City faced voters.

“Andrew may be a victim of heat stroke,” quipped Bill Cunningham, a former staffer for Cuomo’s father, ex-Gov. Mario Cuomo.

Lander greeting a voter in Brooklyn ahead of the primary. Aristide Economopoulos

For all the surprise, polls showed Mamdani’s sunny campaign creeping forward and gaining ground on Cuomo.

His positive polling prospects culminated in an Emerson College Polling/Pix 11/The Hill survey released Monday that showed him besting Cuomo after eight rounds of ranked-choice voting.

Mamdani still likely faces a tough general election in November. He’ll face incumbent Mayor Eric Adams, who is running as an independent, along with Republican nominee Curtis Sliwa and independent Jim Walden.

Cuomo is also expected to potentially run as an independent.

Cuomo addresses his supporters during his concession speech. John Angelillo/UPI/Shutterstock

Mamdani embraces Lander on stage as he accepts the Democratic nomination. AP

But the Democratic source said Cuomo’s potential independent general election run is likely dead on arrival.

“You can’t run a loser against a winner,” the source said.

Cuomo campaign adviser Frank Seddio, former chairman of the Brooklyn Democratic Party, acknowledged the former governor’s camp didn’t envision this vote.

“I don’t believe we are winning this primary election,” he said, though he noted ranked-choice tabulations remain.

Seddio said Cuomo will run a the general election on the Fight & Deliver ballot line.

“We’re just transferring the race to the general election,” he told The Post.

Mamdani’s showing reignited hopes in Adams’ camp that the incumbent mayor can mount a comeback of his own after his mayoralty was imperiled by a federal corruption case.

Adams insiders believe the mayor carries a better chance for re-election against the socialist Mamdani than Cuomo.

“He can,” an insider said of Adams’ prospects. “But it will have to be a perfect effort. And Cuomo will have to bow out.”

— Additional reporting by Vaughn Golden and Carl Campanile