Federal agents arrested a Columbia University student early Thursday after gaining entry to a campus residence; the university said agents misrepresented themselves. The detained student—identified by the university and her lawyers—posted that she had been taken to a vehicle and accused the Department of Homeland Security of wrongful arrest, sparking campus protests and faculty statements. Hours after the detention, New York Mayor Zohran Mamdani said he raised the case during an unrelated White House meeting with President Donald Trump; the student was released shortly thereafter. The episode exposed legal and operational tensions between campuses and immigration enforcement and prompted broader debate about campus safety, federal tactics, and the role of local officials in individual immigration cases.