Catherine Almonte Da Costa resigned from her role as director of appointments for Mayor-elect Zohran Mamdani just one day after her appointment, following the resurfacing of antisemitic social media posts from her teenage years. The posts, highlighted by the Anti-Defamation League, sparked immediate backlash and led Da Costa to issue a public apology, expressing deep regret and noting her current family ties to the Jewish community.

Mayor-elect Mamdani, who is set to become New York's first Muslim mayor, accepted her resignation amid heightened scrutiny over his relationship with Jewish New Yorkers. The controversy comes at a sensitive time, as Mamdani has faced ongoing challenges in building trust with the city's Jewish community, particularly in light of recent protests and his nuanced responses to issues involving Israel and antisemitism.

The incident underscores the complexities facing the incoming administration as it seeks to assemble a diverse team and address concerns from various communities. Da Costa's resignation highlights the lasting impact of social media and the importance of accountability in public service appointments.