Mahmoud Khalil, the Columbia University activist who became a central figure in the Trump administration's crackdown on pro-Palestinian foreign students, filed an appeal with the Supreme Court on Monday, his lawyers confirmed. The move seeks to overturn a lower court ruling that limited his ability to challenge his detention in federal court.
Khalil, a lawful permanent resident, was arrested by immigration authorities in March 2025 and held for months before a federal judge ordered his release. He has consistently maintained that his detention was an act of retaliation for his political speech, a claim that goes to the heart of the case now before the high court.
The Supreme Court is not yet being asked to rule on the merits of his First Amendment defense. Instead, Khalil's appeal challenges a decision by the U.S. Court of Appeals for the 3rd Circuit, which held that federal courts lack jurisdiction to consider his habeas corpus petition until he has exhausted all avenues within the immigration system. That system, which operates under the executive branch, has been criticized by Khalil's legal team as a tool for the administration to delay justice while punishing him.
In their petition, Khalil's lawyers warned that if the appellate ruling stands, the government would gain an unprecedented weapon to silence critics and chill speech among citizens and noncitizens alike. They argue that the First Amendment claim should be heard immediately, not after what could be a lengthy administrative process.
Khalil's case has drawn national attention amid broader debates over free speech on college campuses and the treatment of foreign nationals involved in political activism. His attorneys have expressed hope that the justices will agree to hear the case this term, though the court typically accepts only a small fraction of the petitions it receives.
Until the Supreme Court decides whether to take up the matter, Khalil remains free. The administration has previously asked the justices to intervene in a related case involving Badar Khan Suri, an Indian national and Georgetown University researcher facing deportation, and has acknowledged that the court may want to consider both cases together.
Speaking to reporters, Khalil accused the administration of trying to keep his case out of federal court, calling the immigration courts a “kangaroo” system. He argued that his legal team's allegations would not survive judicial scrutiny, which is why the government is seeking to avoid it.
The Supreme Court is expected to consider Khalil's petition at a private conference in the coming months. A decision on whether to grant review could come shortly thereafter, potentially shaping the legal landscape for other noncitizens facing deportation over their political activities.
This appeal comes as the high court is already poised to address other contentious issues, including race in school admissions and transgender student policy lawsuits. Khalil's case adds another layer of political and legal complexity to a term already marked by high-stakes disputes.
