Brad Lander, the former New York City Comptroller who calls himself a "liberal Zionist" and has backed abolishing ICE since 2018, defeated Rep. Dan Goldman in Tuesday's Democratic primary for New York's 10th Congressional District, ending the congressional career of the man who served as lead counsel during the first impeachment inquiry into President Trump.

The result marks another victory for the progressive wing of the Democratic Party in one of the most left-leaning districts in America, and it arrived with the full backing of New York City Mayor Zohran Mamdani and Sen. Bernie Sanders, who both rallied for Lander ahead of the vote.

Goldman, a wealthy former federal prosecutor who first won the seat in 2022, had the support of Gov. Kathy Hochul. It wasn't enough. Lander entered the final stretch with public polling showing him ahead, and the primary confirmed what the numbers suggested: the district's voters wanted someone further to the left than the man who had made his name prosecuting the case against Trump on Capitol Hill.

A race defined by Israel, ICE, and who could move furthest left

The 10th District spans Lower Manhattan and parts of western Brooklyn, Greenwich Village, the Lower East Side, Brooklyn Heights, Park Slope, and Sunset Park. It is, by any measure, deep-blue territory. And the primary between Lander and Goldman showed just how far left the center of gravity has shifted even within that already progressive electorate.

Lander attacked Goldman for voting in favor of U.S. military aid to Israel and for refusing to call the war in Gaza a genocide. Goldman defended his support for Israel's existence as a Jewish state and argued that voters in the district cared more about domestic issues. That argument did not carry the day.

On immigration enforcement, the two candidates competed over who could position themselves as the stronger opponent of ICE. Lander said he has supported abolishing the agency since 2018 and was arrested at 26 Federal Plaza alongside other elected officials who were seeking access to inspect ICE holding areas. Goldman accused Lander of using that arrest for political fundraising, but Goldman's own campaign platform called to "abolish ICE as we know it," as Fox News Digital reported.

Goldman cast his approach as more institutional, pointing to congressional oversight, litigation, and legislation aimed at curbing ICE tactics. Lander preferred the protest route. The voters chose the protester.

Goldman's rise and fall

Dan Goldman gained national attention as the House Democratic counsel who led the questioning during the first impeachment inquiry into President Trump. He parlayed that profile into a congressional seat, winning a crowded 2022 Democratic primary in the newly redrawn district.

Once in Congress, Goldman became a frequent critic of the president on Capitol Hill. He argued during the primary that he was better positioned than Lander to take on the Trump administration from inside the institution. But in a district where progressive credentials matter more than institutional standing, that pitch fell flat.

The pattern is not unique to New York. Across the country, Sanders- and AOC-backed progressives have been winning primaries in solidly Democratic seats, pushing the party's congressional caucus further left with each cycle.

Mamdani's endorsement network

Mayor Mamdani's role in the race deserves attention. He spoke in support of Lander at Carroll Park in Brooklyn's Carroll Gardens neighborhood on June 14, 2026, just days before the primary. His endorsement carried weight in a district where the progressive infrastructure has grown deep roots.

Lander is a previous member of the Democratic Socialists of America. Mamdani has been backing a slate of like-minded candidates in New York's primaries, building what amounts to a progressive endorsement network that can deliver results in low-turnout Democratic contests.

That network matters because it shapes who represents these districts, not just in primaries, but in Congress. In a district this heavily Democratic, winning the primary is tantamount to winning the seat. Lander will enter the general election as the heavy favorite against Jennifer Moore, the Republican and Conservative Party nominee in November.

The dynamic mirrors what has played out in other races where establishment Democrats have tried to block progressive challengers, sometimes successfully, sometimes not. In New York's 10th, the establishment lost.

What the primary tells us

Consider what happened here. A sitting congressman who built his career on impeaching Donald Trump, a man with the governor's endorsement and a record of aggressive opposition to the current administration, lost his seat because he was not far enough left on Israel and immigration enforcement for his own party's voters.

Goldman voted for military aid to Israel. His opponent called that disqualifying. Goldman refused to label the Gaza conflict a genocide. His opponent made that a central issue. Goldman proposed reforming ICE through legislation and oversight. His opponent got arrested outside a federal building and won.

The race between Lander and Goldman was not a contest between a moderate and a progressive. Both candidates supported some version of abolishing ICE. Both opposed the Trump administration. The contest was over degree, how far left, how fast, and how loudly.

That tells you something about where the Democratic Party's activist base is headed, particularly in urban strongholds. The surprising primary surges that have rattled party leaders in recent cycles are not anomalies. They are the new normal in districts where general elections are foregone conclusions and the real battle is fought among factions of the left.

The general election ahead

Jennifer Moore will carry the Republican and Conservative Party banner against Lander in November. In a district that includes Greenwich Village and Park Slope, the math is daunting. But the primary result gives Moore, and Republicans nationally, a clear contrast to draw.

Lander supports abolishing ICE. He was arrested protesting immigration enforcement. He attacked his own party's incumbent for supporting military aid to a U.S. ally. He ran with the backing of Bernie Sanders and a mayor Fox News Digital describes as a socialist. These are not positions that play well outside the Brooklyn bubble.

Whether Republicans can capitalize on that contrast in competitive districts elsewhere remains to be seen. But the Democratic Party's leftward lurch in safe seats has consequences that ripple outward. Every new member of Congress who arrives pledging to abolish ICE and cut off aid to Israel shifts the caucus, and the policy debate, further from where most American voters stand.

The broader trend is visible in races across the map. In competitive Senate contests, Democrats face the challenge of reconciling their base's demands with the preferences of general-election voters. In safe House seats, they face no such pressure, and the results speak for themselves.

What Goldman's loss means for the anti-Trump brand

Goldman built his political identity around opposing Trump. He was the lawyer who led the impeachment questioning. He ran for Congress on that record. He spent his time in office as one of the president's most vocal critics on Capitol Hill.

None of it saved him. In the end, the Democratic base in New York's 10th District decided that opposing Trump was table stakes, not a distinguishing credential. What mattered more was where a candidate stood on Gaza, on ICE, and on the broader progressive agenda.

That should give pause to every Democrat who has built a brand around anti-Trump rhetoric. The base has moved on. The new litmus tests are about policy positions that would have been considered fringe a decade ago. Abolishing ICE. Labeling U.S. allies as perpetrators of genocide. Getting arrested at federal buildings to prove your commitment.

Lander passed those tests. Goldman did not. And now Goldman is out of a job.

When the man who led Trump's impeachment isn't far enough left to hold a House seat in lower Manhattan, the Democratic Party's center of gravity isn't just shifting, it has already moved.