Leon Goldenberg, a prominent Orthodox Jewish leader in Brooklyn, is endorsing former New York Gov. Andrew Cuomo for New York City mayor, he confirmed exclusively to Jewish Insider on Friday.

“I am fully endorsing Gov. Cuomo,” Goldenberg said. “I think he’s the best candidate by far. He’s accomplished for the city and the state. We need somebody who’s going to get things accomplished and who’s going to fight antisemitism as a major issue.”

Goldenberg, who is an executive board member of the Flatbush Jewish Community Coalition, said that he was backing Cuomo in his personal capacity, but he anticipated his group would also endorse the former governor after the Jewish holiday of Shavuot, which concludes on Tuesday evening.

His early endorsement is among the first major signs of formal Orthodox support for Cuomo with just over three weeks until the June 24 Democratic primary. The former governor has in recent weeks engaged in proactive outreach to Orthodox leaders who represent sizable voting blocs that could prove crucial in the increasingly competitive race.

While polling has shown Cuomo leading the crowded primary field, his comfortable margin has narrowed as Zohran Mamdani, a far-left state assemblyman in Queens, has recently come within eight points of the former governor in the final round of ranked-choice voting, according to an independent survey released earlier this week.

Mamdani, an outspoken critic of Israel who is the only candidate in the primary to publicly back the Boycott, Divestment and Sanctions movement, has voiced rhetoric that has raised alarms among many Jewish leaders as his campaign continues to surge. 

Recently, Mamdani faced scrutiny for declining to recognize Israel as a Jewish state while speaking at a town hall last week hosted by the UJA-Federation of New York. He also stirred controversy this week over his comments to a mosque in Queens in which he denounced Israel’s pager attack last year against Hezbollah in Lebanon without mentioning it had been aimed at the terror group’s operatives rather than civilians.

Goldenberg said his lone endorsement of Cuomo was in many ways meant to raise awareness about the stakes of what appears to have become a two-person race. 

“We’re trying to get the message out about how important it is to support Cuomo,” Goldenberg said. “Mamdani, who will do very well in ranked-choice voting where Cuomo will not do as well, is really gaining a lot of ground.”

Cuomo has also notched support from Sam Berger, an Orthodox state assemblyman from Queens who has accused Mamdani of stoking antisemitism. But leading Orthodox groups, whose endorsements can traditionally yield thousands of votes that have helped tipped the scales in close elections, have yet to weigh in on the primary.

In recent weeks, Cuomo has met privately with a range of Orthodox leaders to mend relationships that deteriorated over restrictions he implemented at the height of the COVID pandemic, which many community members still recall as discriminatory.

The former governor has voiced regret for creating “the impression that the community was targeted,” which he said was not his intention, and recognized that he “could have done more” to address concerns at the time.

Though Orthodox leaders have been receptive to his outreach, constituents are still bitter about Cuomo’s COVID record, even as he has expressed contrition, according to people familiar with the conversations.

For his part, Goldenberg, whose group in Flatbush met with Cuomo this month, said that he had been satisfied with Cuomo’s response to criticism during their discussion, but emphasized he is now engaging in outreach to younger voters who may not be closely following the primary. 

Mamdani “is not going to be a friend of the Jews,” Goldenberg told JI. “That’s the message that just has to get out more and more forcefully, especially in the Orthodox community, which is still incensed about COVID.”

Even as Mamdani has also sought to engage with the community, a recent poll showed his support at 0% among Orthodox voters, while faring better with other Jewish denominations. Cuomo, meanwhile, performs strongest in the Orthodox community, claiming 41% of the vote, according to the poll.

In the broader Jewish community, Cuomo, who has frequently touted his support for Israel while calling antisemitism “the most important issue” in the race, is leading the field with a relatively small plurality of the vote, recent polls suggest.

Despite leading all publicly available polls, Cuomo also holds high unfavorability ratings stemming in large part from his resignation as governor amid allegations of sexual misconduct, which he denies.

In a tight race, the Orthodox community could help close the margins for Cuomo, as previous primaries have shown. Mayor Eric Adams, now running as an independent, narrowly won the nomination in 2021 with critical support from Orthodox leaders, whose communities tend to vote as a bloc.

“The Orthodox community can make a difference,” said Goldenberg, whose group endorsed Adams last cycle. “If we come out forcefully.” 

He estimated there are at least 100,000 Orthodox voters in Flatbush alone, but was unable to share a party breakdown. “We have been pushing people to register as Democrats, and have had some success,” he told JI. “We’ll keep pushing it.”

In the meantime, Goldbenberg said he expects other Orthodox leaders will also soon fall behind Cuomo. “I think it really has to happen across the board,” he told JI. “So many others are holding back, but I think we have to get the momentum.”

“Sometimes there’s a choice and you’re wavering until you get near the end,” he said, but dismissed the other candidates as unviable. “There’s no other choice today.”

One Orthodox leader, who spoke anonymously to address private discussions, suggested that “by the end of next week” endorsements would likely begin to roll in. 

A major Satmar faction in Williamsburg, home to the largest Hasidic community in New York City, is currently planning to endorse Cuomo the week after next, according to a community leader familiar with the matter.

“Nothing is final until final,” the community leader clarified on Friday, “but that’s the expectation.”