Zohran Mamdani, New York City mayor since January 2026 and a naturalized U.S. citizen since 2018, has faced Republican calls for denaturalization proceedings over alleged nondisclosure of associations on his application. These efforts, led by figures such as Rep. Andy Ogles in 2025, have not produced active federal court cases or successful revocation as of mid-2026. Denaturalization requires judicial proof of willful material misrepresentation, a high evidentiary bar with limited historical precedent outside criminal contexts. The Trump administration has directed greater DOJ focus on such cases, yet legal experts note substantial constitutional and procedural hurdles, plus Mamdani's access to strong defense resources. Trader consensus at 97.6% for "No" by 2027 reflects these barriers and the absence of advancing litigation. Remaining scenarios that could shift odds include a swift DOJ filing with court-validated evidence of fraud before year-end, though timelines and outcomes remain uncertain given ongoing litigation patterns.