Brad Lander, the New York City comptroller, is actively weighing a challenge to Rep. Dan Goldman (D-NY) in next year’s primary election, according to people familiar with the matter, raising the prospect of a competitive race between an ally of far-left Democratic mayoral nominee Zohran Mamdani and a pro-Israel incumbent.

Lander had, until recently, been widely expected to land a top job in a potential Mamdani administration, with whom he cross-endorsed during the June primary.

But following reports of an emerging strain in their alliance, Lander, a 56-year-old Jewish Democrat, is more closely eyeing Goldman’s seat, which covers Lower Manhattan and a section of Brooklyn that includes the progressive enclave of Park Slope. Lander’s thinking was reported on Monday by City & State New York, which said that he had told allies he was planning a primary challenge to Goldman.

Political strategists predicted that Lander, a longtime resident of Park Slope who represented parts of the district as a city councilman, would be a formidable candidate, particularly if Mamdani wins the mayoral race. “The polling and voter data would indicate a progressive running in this district would have a strong chance,” Chris Coffey, a Democratic consultant who resides in the district, told Jewish Insider on Monday.

“Dan will presumably have money and he’s the incumbent,” Coffey said of Goldman, an heir to the Levi Strauss fortune whose estimated net worth is up to $250 million. “But the mayor’s race will hang over this race.”

A primary matchup between Lander and Goldman would serve as a test of the Democratic electorate’s support for mainstream pro-Israel representation in New York City, as Mamdani’s campaign has brought renewed energy to the activist left opposed to Israel’s war in Gaza and lawmakers’ continued support for the Jewish state.

Goldman, a Jewish Democrat, has faced some backlash from constituents in his overwhelmingly left-leaning district over his support for Israel and continued refusal to endorse Mamdani, who is the front-runner in next Tuesday’s mayoral race. 

The 49-year-old congressman said in an interview last week that he remains “very concerned about some of the rhetoric coming from” Mamdani with regard to Israel. Goldman told CNN he had asked Mamdani, who has long been a fierce critic of Israel, to speak out against rising anti-Israel violence, but “I frankly haven’t really seen him do much on that.”

The potential race would also set up a unique clash between two Democrats who identify as Zionists but have differing views on what the term means. While Lander has been a vocal critic of Israel’s war in Gaza and called for pulling aid to Israel, Goldman, for his part, has been a defender of Israel during his tenure in office — even as he has not hesitated to challenge the Israeli government on key issues.

A spokesperson for Lander told JI on Monday that he is now “focused on electing Zohran Mamdani as mayor of New York City,” but did not comment on a challenge to Goldman.

Lander, speaking at a rally for Mamdani’s campaign on Sunday evening, made comments about electing progressives that some political observers viewed as a possible hint at his own plans to run for Goldman’s seat next year.

“We’ll take that fight to the halls of Congress, where it’s more important than ever that we have leaders who understand this moment and will be partners to Zohran,” said the outgoing one-term comptroller.

Goldman’s team, which recently dismissed a poll showing that he would lose in a primary opposing Lander, did not respond to a request for comment. 

In a statement on Monday, Goldman weighed in on a new lawsuit challenging a House district covering Staten Island and parts of southern Brooklyn, which if successful could reshape the congressional map in New York. The seat, held by Rep. Nicole Malliotakis (R-NY), borders Goldman’s district.

“NY-10 is my home and I will be running for Congress in my home district,” Goldman said in his statement. “If Staten Island is drawn into my district, then I will be ready to step up and take the fight for democracy and a Democratic House majority to Nicole Malliotakis’ doorstep. Nothing can stand in the way of us defeating Donald Trump and his spineless lackeys in Congress. Flipping the House isn’t optional — our future depends on it.”

If Lander chooses to run, he would likely have some company on the left in the primary, as Alexa Avilés, a city councilwoman who is closely aligned with the Democratic Socialists of America, is also reportedly exploring a bid, threatening to split the progressive vote.

One Democratic insider said that Lander had, as of last week, been informing allies he was going to join a likely future Mamdani administration. “Maybe he is floating his name to keep options open and Alexa out,” the insider speculated to JI on Monday.

In addition to Avilés, Yuh-Line Niou, a far-left former state assemblywoman, is also considering a primary challenge to Goldman, people familiar with the matter told JI. Goldman narrowly defeated Niou in a crowded primary in 2022, when he was first elected to the House. 

Niou did not respond to a request for comment on Monday. 

Even as he has drawn criticism from some left-wing voters, Goldman still maintains solid support in one of the more heavily Jewish congressional districts in the country, according to Ramon Maislen, a Jewish community activist in Park Slope.

“Many progressive and moderate Democrats will happily line up behind Dan,” Maislen told JI.

A new poll commissioned by a left-wing advocacy group is raising hopes among progressive activists eager to enlist a challenger to take on Rep. Dan Goldman (D-NY), a pro-Israel Democrat whose House district leans heavily to the left, in next year’s June primary election.

The poll, released this week by Demand Progress Action, shows Brad Lander, the New York City comptroller, leading by 19 points in a hypothetical head-to-head matchup with Goldman, who wins just 33% of the vote. Lander, who served as a longtime city councilman in the district, claims 52% among likely Democratic primary voters, while also boasting a higher favorability rating, according to the poll.

While the survey was meant to coax Lander into entering the primary, it remains unclear if he has the appetite to compete in what would likely be a bitter race for the seat covering Lower Manhattan and a swath of Brooklyn, including such progressive enclaves as Park Slope.

Lander, a well-known progressive who has not explicitly ruled out a congressional bid after losing in the New York City mayoral primary, is more widely expected to accept a senior role in a potential administration of Zohran Mamdani, the far-left Democratic nominee for mayor whose upset in June lent renewed energy to progressive activists who have eyed challenges to several mainstream House Democrats in New York City.

Still, Lander had been looking at Goldman’s seat since before the primary concluded, according to a political consultant familiar with the situation, who suggested the city comptroller could be “serious” about a campaign.

Lander’s team, several members of which have joined Mamdani’s campaign, has also reportedly clashed with the nominee’s aides, fueling speculation about his prospects for securing a position in a potential future administration. A person familiar with some of the internal tensions said broadly that they stem in part from a lingering Brooklyn political dispute involving Lander and grudgingly recalled by some close aides to Mamdani.

“I think that Lander can beat Goldman, but I thought that even before the poll came out,” said a political consultant who worked to elect Goldman during his first primary in 2022, when the former Trump impeachment prosecutor beat a crowded field of progressives to clinch the nomination with a plurality of the vote.

A spokesperson for Lander did not respond to a request for comment from Jewish Insider on his plans for a challenge. His team has otherwise said that “there is no drama between Brad and Zohran or their ‘camps.’”

If Lander chooses to run for the seat held by Goldman, a two-term Jewish Democrat whose strong support for Israel and refusal to endorse Mamdani have sparked backlash among left-wing voters, he would be a formidable candidate, experts say, citing his widespread popularity in a district he has long called home.

“I think that Lander can beat Goldman, but I thought that even before the poll came out,” said a political consultant who worked to elect Goldman during his first primary in 2022, when the former Trump impeachment prosecutor beat a crowded field of progressives to clinch the nomination with a plurality of the vote.

The potential matchup would also set up a unique primary between two Jewish Democrats who both identify as Zionists but have differing approaches to what that label means, particularly in the aftermath of Hamas Oct. 7, 2023, attacks and the ensuing war in Gaza.

Goldman, for his part, has continued to back U.S. military aid to Israel, even as he recently said the “crisis in Gaza shocks the conscience” and Israeli Prime Minister Benjamin Netanyahu’s “personal and political interests are guiding Israel’s actions, rather than what is best for” the Jewish state.

The 49-year-old lawmaker has also withheld an endorsement of Mamdani until he takes “concrete steps” to address concerns raised by Jewish voters over his anti-Israel rhetoric, including his refusal to explicitly condemn calls to “globalize the intifada,” a phrase many Jews view as antisemitic. Mamdani has said he does not use the slogan and that he will discourage its usage.

Goldman’s largely left-leaning House seat “is probably one of the biggest changes in terms of pro-Israel to not pro-Israel districts in the city,” said Chris Coffey, a veteran Democratic strategist who lives in the district and helped advise former Gov. Andrew Cuomo’s mayoral bid during the primary.

Lander, who has long identified as a progressive Zionist, is a vocal critic of Israel’s war in Gaza and has called for pulling aid to Israel. The 56-year-old comptroller has faced criticism from the organized Jewish community for divesting from Israel bonds while in office, though he has said the decision was not political. Lander was a key Jewish validator for Mamdani in the primary, cross-endorsing with the 33-year-old democratic socialist and assemblyman from Queens. Mamdani won Goldman’s district in June.

Speaking at a Jews for Racial and Economic Justice event earlier this week, Lander said he had not done enough “to speak out against Israel’s war crimes, against ethnic cleansing, against forced starvation of Palestinians.”

Chris Coffey, a veteran Democratic strategist who lives in the district and helped advise former Gov. Andrew Cuomo’s mayoral bid during the primary, said that Goldman is not likely to find himself in a vulnerable position unless Lander chooses to run, an outcome he does not anticipate with Mamdani well poised to win the general election.

Still, Goldman is now in a “precarious place,” Coffey told JI, “where he’s a pro-Israel Democrat in a time when it’s been harder to be a pro-Israel Democrat.”

Goldman’s largely left-leaning House seat “is probably one of the biggest changes in terms of pro-Israel to not pro-Israel districts in the city,” he added, noting the shift had occurred in recent years amid growing Democratic divisions over Israel and Gaza.

Some observers recently speculated that Goldman could switch districts and run for retiring Rep. Jerry Nadler’s (D-NY) seat further north in Manhattan, where he would likely face a more friendly electorate. But his team has dismissed that idea as unfounded and said Goldman had no plans to run for another seat.   

“Dan Goldman isn’t a moderate, he’s definitely left of center,” said the political consultant close to Goldman, who is now working on a super PAC to oppose Mamdani. “Brad may win because of his name ID and reputation but any other opponent would likely lose.”

The poll released on Wednesday underscored that view, showing that Goldman would win with 41% of the vote against an unnamed Democratic candidate. His lead evaporated after the poll had, among other things, linked him to the pro-Israel lobbying group AIPAC, which had quietly funded a local super PAC three years ago to help boost his first primary bid.

AIPAC, whose political arm endorsed Goldman in February, did not return a request for comment on a potential primary.

“Dan is laser-focused on rooting out government corruption, defending our democracy from Donald Trump and leveling the playing field for all New Yorkers.” Simone Kanter, a senior advisor to Goldman, told JI. “Anyone who would like to throw their hat in the ring is more than welcome to.”

David Greenfield, a former city councilman who leads the Jewish anti-poverty group Met Council, said the results of the poll were unsurprising, even as he dismissed the survey for posing a “misleading” question. “Everyone knows Brad is not running for Congress,” he told JI, “because he’s slated to join a Zohran Mamdani administration.”

It was unclear if the poll had surveyed respondents about other potential candidates. Demand Progress Action did not return requests for comment, nor did Data for Progress, a progressive firm that conducted the poll.

Simone Kanter, a senior advisor to Goldman, told JI the congressman’s team is “not paying any attention to agenda-driven push polls.”

“Dan is laser-focused on rooting out government corruption, defending our democracy from Donald Trump and leveling the playing field for all New Yorkers.” Kanter said on Thursday. “Anyone who would like to throw their hat in the ring is more than welcome to.”

While a competitive primary would likely attract spending from outside groups, Goldman, an heir to the Levi Strauss fortune whose estimated net worth is up to $250 million, could also self-fund his bid as he did in 2022 — when he prevailed with 26% of the vote in a crowded field of well-known politicians. 

Yuh-Line Niou, a former state assemblywoman who came in second in 2022 with 24%, has said privately she plans to run again and has been making calls to feel out support, according to a person familiar with the matter.

Niou, an outspoken progressive who faced backlash in the last race for backing the Boycott, Divestment and Sanctions movement against Israel, declined to comment on the record when reached this week by JI. 

Goldman is also likely to face a repeat challenger from his 2024 primary, Evan Hutchison, who won 24% of the vote last cycle and has recently sent out fundraising texts saying that the incumbent “won’t condemn Israel’s genocide in Gaza.” But strategists said they do not see his campaign as a serious threat to Goldman, who claimed 66% in his last primary.