Technology

Zohran Mamdani Appointee Quits Over Past Antisemitic Posts

December 18, 2025 5 min read views
Zohran Mamdani Appointee Quits Over Past Antisemitic Posts
Gabe WhisnantBy Gabe Whisnant

Breaking News Editor

ShareNewsweek is a Trust Project member

One of New York City Mayor-elect Zohran Mamdani’s recent appointees has resigned after social media posts she made more than a decade ago resurfaced and drew criticism for featuring antisemitic tropes, the mayor-elect’s office said Thursday.

Catherine Almonte Da Costa, who had been tapped this week to join the incoming administration, said in a statement that she deeply regretted the posts, which date to 2011 and 2012 and were recently circulated online by the Anti-Defamation League.

...

Why It Matters

Mamdani, a self-proclaimed democratic socialist, has faced sustained scrutiny from some Jewish groups and political opponents over whether his criticism of Israel’s military actions in Gaza crosses into antisemitism. During the campaign, he drew criticism for declining to condemn the phrase “globalize the intifada,” though he has since said he discourages its use and opposes antisemitism in all forms.

A majority of New York City Jewish voters backed Andrew Cuomo, a former Democrat running as an independent, in the mayoral race, with 63% supporting him compared with 33% who voted for Mamdani, according to a CNN poll released following Mamdani’s victory. Republican candidate Curtis Sliwa received support from 3% of Jewish voters, the poll found.

What To Know

Da Costa had been selected to lead Mamdani’s office of appointments, a role responsible for shaping talent recruitment and staffing strategy for the new administration. She previously worked in the mayor’s office more than a decade ago and has more recently held positions at a private communications firm and at the auction house Sotheby’s, according to Mamdani’s office.

Mamdani accepted her resignation, a spokesperson confirmed.

The Anti-Defamation League declined to comment following Da Costa’s resignation. The Jewish advocacy organization had shared three posts attributed to Da Costa, saying they “echo classic antisemitic tropes and otherwise demean Jewish people.”

After Mamdani’s election victory in November, the group announced it was launching a new tool to track and monitor policies and personnel decisions made by the incoming mayor, who has been sharply critical of Israel.

What People Are Saying

Da Costa said in a statement, “These statements are not indicative of who I am. As the mother of Jewish children, I feel a profound sense of sadness and remorse at the harm these words have caused.”

Mamdani said in a statement, “Catherine expressed her deep remorse over her past statements and tendered her resignation, and I accepted."

What Happens Next

Mamdani takes office next month.

This is a breaking news story. Updates to follow. 

Request Reprint & LicensingSubmit CorrectionView Editorial & AI GuidelinesGoogle Preferred Source BannerAdd Newsweek as a preferred source on Google to see more of our trusted coverage when you search.

Recommended For You

Donald Trump Extraditing Wiz Khalifa to Romania Would Be ‘Absurd’: ExpertNewsDonald Trump Extraditing Wiz Khalifa to Romania Would Be ‘Absurd’: Expert3 min readZohran Mamdani Appointee Quits Over Past Antisemitic PostsNewsZohran Mamdani Appointee Quits Over Past Antisemitic Posts3 min readPam Bondi Issued Impeachment Ultimatum Ahead of Epstein Files DeadlineNewsPam Bondi Issued Impeachment Ultimatum Ahead of Epstein Files Deadline5 min readTikTok Signs US Deal With 3 Investors: What to KnowNewsTikTok Signs US Deal With 3 Investors: What to Know2 min readArizona Governor’s Poll Shows Katie Hobbs’ Chances of Beating Andy BiggsNewsArizona Governor’s Poll Shows Katie Hobbs’ Chances of Beating Andy Biggs3 min readDonald Trump’s Patriot Games Spark Hunger Games ComparisonNewsDonald Trump’s Patriot Games Spark Hunger Games Comparison4 min read

Related Podcasts

Top Stories

Epstein Photos: Woman With ‘Lolita’ Quotes Written On Her Body Seen in New Images, As Files Deadline Approaches — RecapNewsEpstein Photos: Woman With ‘Lolita’ Quotes Written On Her Body Seen in New Images, As Files Deadline Approaches — Recap2 min readBrown Mass Shooting Update: Person of Interest Identified — ReportU.S.Brown Mass Shooting Update: Person of Interest Identified — Report4 min readUncommon Knowledge: The Quiet Promise That Could Define Trump’s 2026For MembersNewsUncommon Knowledge: The Quiet Promise That Could Define Trump’s 20264 min readPam Bondi Issued Impeachment Ultimatum Ahead of Epstein Files DeadlineNewsPam Bondi Issued Impeachment Ultimatum Ahead of Epstein Files Deadline5 min readDonald Trump’s Patriot Games Spark Hunger Games ComparisonNewsDonald Trump’s Patriot Games Spark Hunger Games Comparison4 min readGreg Biffle, Family Dead After North Carolina Plane CrashNewsGreg Biffle, Family Dead After North Carolina Plane Crash2 min read

Trending

Flags Ordered To Fly at Half-Staff Across 6 US States Today FlagFlags Ordered To Fly at Half-Staff Across 6 US States Today5 min readFlorida Map Shows Cities That Could Go Underwater if Sea Levels RiseFloridaFlorida Map Shows Cities That Could Go Underwater if Sea Levels Rise5 min readWatch the Exact Moment Dog Realizes He’s Never Going Back to the ShelterDogsWatch the Exact Moment Dog Realizes He’s Never Going Back to the Shelter4 min readDonald Trump Offered $250M to Run for a Third TermDonald TrumpDonald Trump Offered $250M to Run for a Third Term4 min readWinter Storm Warning As 16 Inches of Snow To Strike: ‘Impossible’SnowWinter Storm Warning As 16 Inches of Snow To Strike: ‘Impossible’4 min read

Opinion

The World Failed Holocaust Survivors at Bondi Beach | OpinionOpinionThe World Failed Holocaust Survivors at Bondi Beach | Opinion5 min readMake-A-Wish Co-Founder: Healing Communities for 45 Years, One Wish at a Time | OpinionOpinionMake-A-Wish Co-Founder: Healing Communities for 45 Years, One Wish at a Time | Opinion5 min readConventional Wisdom: The Susie Wiles Tell-All EditionFor MembersOpinionConventional Wisdom: The Susie Wiles Tell-All Edition4 min readMore ‘Gun Control’ Is Not the Answer | OpinionOpinionMore ‘Gun Control’ Is Not the Answer | Opinion6 min readThe Bondi Beach Terror Attack Must Strengthen, Not Shatter, Our Bridges | OpinionOpinionThe Bondi Beach Terror Attack Must Strengthen, Not Shatter, Our Bridges | Opinion5 min read