Mahmoud Khalil takes deportation fight to the US Supreme Court in free-speech showdown
Pro-Palestine activist Mahmoud Khalil has petitioned the United States Supreme Court to review a court ruling that could pave the way for his re-arrest and deportation. His lawyers are seeking to overturn an appeals court decision that would allow for his removal.
On Monday, Khalil's lawyers filed an emergency application to the high court, seeking an immediate stay of a decision from Philadelphia's 3rd Circuit Court of Appeals.
That court had ruled that federal law should have prohibited lower courts from ordering Khalil's release from immigration detention in June 2025. Instead, the appeals court said, his detention should have been weighed first in an immigration court — a system overseen by the executive branch — and not in district court, which is part of the judicial branch.
Khalil's petition could result in a major legal showdown that determines whether federal courts can intervene when noncitizens face retaliatory detention for speech protected under the First Amendment of the US Constitution.
His lawyers have asked the Supreme Court to rule that noncitizens do indeed have the right to sue if immigration officials detain them as a reprisal for exercising free speech.
'If the Trump administration can punish someone for their pro-Palestine speech, this or any future administration can punish anyone for any speech,' Khalil said during a news conference on Monday.
In March 2025, Khalil became the first student protester known to be targeted for his pro-Palestinian views under the second administration of President Donald Trump. A permanent US resident and former Columbia University graduate student, he was arrested inside the student housing complex where he lived with his wife, a US citizen.
Trump had campaigned for re-election in 2024 in part on a pledge to crack down on the pro-Palestinian student protest movement, which had erupted in 2023. Columbia University in New York became an epicentre of that activism, and Khalil — born in a Palestinian refugee camp in Syria — had served as a spokesperson for the protest groups.
The Trump administration has characterised pro-Palestinian activism as a threat to US foreign policy interests, and has argued it has the legal right to deport noncitizens who engage in such protests.
After his arrest, Khalil was quickly moved to immigration detention centres in New Jersey, then Louisiana, where he remained in custody for more than three months.
He has fought his deportation both in the immigration court system and in the federal district court system, where he has filed a habeas corpus case; both cases remain ongoing. In April, the Board of Immigration Appeals denied his appeal in the immigration system and issued a final order of removal. If the 3rd Circuit's decision holds, Khalil faces deportation to Algeria or Syria. In May, the 3rd Circuit narrowly voted six-to-five against reconsidering his case, but its decision will not go into effect until he has exhausted his appeals.
On Monday, meanwhile, faculty and staff at Columbia University held a silent vigil outside one of the school's gates to protest what they described as 'abducted students' taken by Immigration and Customs Enforcement (ICE). Placards bearing portraits of Khalil and fellow student protester Mohsen Mahdawi, among others, were hoisted into the air. Demonstrators called for solidarity with the students facing deportation and pushed for Columbia to reopen its gates to the public after their closure during the protest movement.
