ENHANCED & FORMATTED ARTICLE

Mayor Mamdani’s Endorsed Candidates Sweep New York Primaries, Deepening Democratic Divisions

New York — In a series of high-stakes Democratic primary elections, three candidates backed by New York City Mayor Zohran Mamdani secured victories, including two who ousted incumbent members of Congress. The results have triggered sharp reactions from across the political spectrum and laid bare the deepening ideological rift within the Democratic Party.

The Winners

"The movement is not an anomaly—it is a beginning." — Mayor Zohran Mamdani

The following Mamdani-endorsed candidates won their primary contests:

Darializa Avila Chevalier — Defeated incumbent Rep. Adriano Espaillat in New York's 13th Congressional District. A graduate student and member of the Democratic Socialists of America (DSA), she campaigns on abolishing ICE, ending deportations, and implementing socialized healthcare. She has faced criticism for past social media posts that included calls for property seizure, referring to former President Joe Biden as a "rapist," cursing former Vice President Kamala Harris, and demanding police abolition.
Brad Lander — Defeated incumbent Rep. Dan Goldman in New York's 10th Congressional District. A progressive Democrat and former DSA member, Lander left the organization in 2023.
Claire Valdez — A state representative and DSA member, won her primary in New York's 7th Congressional District. She is expected to fill the seat of retiring Rep. Nydia Velázquez, defeating Antonio Reynoso.

In total, nine Democratic incumbents lost their seats—seven state lawmakers and two congressmen. Mayor Mamdani also supported five candidates in state legislative races who won their primaries.

Democratic Reactions: Alarm, Defiance, and Debate

The party’s response was fractured, reflecting the very tensions the primaries exposed.

House Minority Leader Hakeem Jeffries (D-NY) downplayed the significance for battleground districts and said Mamdani has "work to do" building relationships with members of Congress.

Rep. Josh Gottheimer (D-NJ) fired a warning shot: "Obviously, the socialists had a big win last night. The question is, are we going to let them take over the party? Or are we going to stand up and fight back?" He added, "Many of us believe, as I do, that if you're a socialist, you're not a Democrat."

Rep. Greg Meeks (D-NY) was blunt: "If you ask me, it was not a good night for New York."

New York Attorney General Letitia James expressed disappointment, arguing some endorsed candidates lack understanding of New York City’s politics and cultural differences. She acknowledged dissatisfaction with the party but warned that internal divisions could damage electoral prospects, preferring to "reach an understanding with socialists to defuse tensions."

Rep. Ro Khanna (D-CA) called the results "a big win for the progressive wing of the party."

Rep. Vicente Gonzalez (D-TX) said the results reflect the influence of a small minority and called for more organizing around moderate policies.

Rep. Marc Veasey (D-TX) dismissed the gains, insisting moderates are playing a longer game.

Rep. Summer Lee (D-PA) urged the party to welcome the new nominees and understand their perspectives.

Sen. Richard Blumenthal (D-CT) said efforts to nationalize the New York results would fail.

Sen. Chris Murphy (D-CT) suggested the party should draw lessons about bolder policies and tactics.

Sen. Peter Welch (D-VT) emphasized the challenge of unifying different viewpoints to serve struggling constituents.

Sen. Bernie Sanders (I-VT, who caucuses with Democrats) said the results show "voters are tired of establishment politics."

Behind the scenes, the anxiety is palpable. An anonymous Democratic lawmaker from a battleground district reported having "serious conversations with donors about leaving the party" over the rise of the DSA. A senior House Democratic aide noted the victories reflect an "anti-establishment strategy beyond messaging" that the party must address.

Republican Reactions: Triumph and Opportunity

President Donald Trump seized on the results, posting on Truth Social that the winning candidates are "communist" and "many Communists running in badly failing Blue States." He wrote: "History has conclusively shown that the downtrodden States that they will soon be running will ONLY GET WORSE." He singled out Rep. Dan Goldman, calling him "weak and pathetic" before declaring, "America the Beautiful will NEVER be a Communist Country!!!"

Trump claimed his endorsements resulted in 259 primary wins over two years, with "Zero media attention."

The White House declined to comment.

Some Republicans view the socialist victories as a gift for the GOP. Republican operatives plan to use Mayor Mamdani’s slate to attack Democrats in competitive midterm races, predicting the candidates' statements could "harm the Democratic Party's national image."

Voter Analysis: A Tale of Two Electorates

In New York's 13th Congressional District, voting data reveals a sharp split:

Incumbent Espaillat won lower-income and majority-Black precincts.
Challenger Chevalier carried areas with higher incomes, more university graduates, and younger residents.

A Democratic political operative told the New York Post that Black and Hispanic voters oppose the DSA's efforts in Harlem, describing the agenda as "nuts." The operative noted that affluent voters backed DSA-affiliated candidates while working-class residents supported establishment picks.

The Stakes

The winning candidates ran on affordability and anti-establishment messaging, including criticism of US military support for Israel.

Some Democratic lawmakers fear the results could make it harder to flip the House in November, as Republicans may use the candidates' positions in attack ads.

With the November 2026 midterm elections less than a year away and control of Congress on the line, the Democratic Party faces a defining question: embrace its insurgent left or push back.