Mahmoud Khalil Asks Supreme Court to Block Deportation

A legal challenge by Palestinian activist Mahmoud Khalil has reached the US Supreme Court, where he is seeking to prevent a ruling from clearing the way for his re-arrest and deportation. His lawyers filed an emergency application on Monday, October 19, asking the justices to suspend the decision while his separate immigration proceedings continue. The case centers on whether federal courts can review immigration detention when a noncitizen alleges that authorities are retaliating against constitutionally protected speech.

Khalil, a permanent US resident and former Columbia University graduate student, was arrested in March 2025 over his involvement in pro-Palestinian campus activism, making him the first known student protester targeted for such views during President Donald Trump's second administration. According to the case history reported by Al Jazeera, the US Court of Appeals for the 3rd Circuit, based in Philadelphia, ruled that federal law barred lower courts from ordering Khalil's release from immigration detention in June 2025. The appeals court said his detention should first have been reviewed through the immigration court system, which operates under the executive branch, rather than through a federal district court.

Khalil's legal team is asking the Supreme Court to recognize that noncitizens can sue immigration officials when they believe detention was imposed in retaliation for exercising free speech rights under the First Amendment. The immediate request seeks to preserve his ability to challenge detention and possible removal from the United States before the consequences of the appeals court ruling take effect.

Addressing reporters on Monday, Khalil warned that the dispute could affect protections for political expression beyond his own case. "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.

The deportation dispute has become a prominent legal and political controversy surrounding the boundaries of campus protest and the federal government's immigration authority. Trump campaigned for reelection in 2024 partly on a pledge to crack down on the pro-Palestinian student protest movement that emerged in 2023. The administration has argued that pro-Palestinian activism can threaten US foreign policy interests and that immigration authorities have the legal power to deport noncitizens involved in such demonstrations. Khalil's case raises the question of how those enforcement powers interact with constitutional protections for speech.

Khalil was arrested at the student housing complex where he lived with his wife, a US citizen. Born in a Palestinian refugee camp in Syria, he had served as a spokesperson for protest groups at Columbia University in New York, which became a major center of campus activism. After his arrest, authorities transferred him between immigration detention facilities in New Jersey and Louisiana, where he remained in custody for more than three months.

If the 3rd Circuit's decision ultimately stands, he could face deportation to Algeria or Syria. The appeals court rejected a request to reconsider the case by a 6-to-5 vote in May. However, its decision will not take effect until Khalil exhausts his available appeals, according to Al Jazeera.

His challenges have proceeded through two separate legal channels. The Board of Immigration Appeals rejected his immigration appeal in April and issued a final removal order, while his federal district court habeas corpus case and immigration proceedings remain ongoing.

The Supreme Court application comes amid continued campus demonstrations over immigration enforcement. On Monday, Columbia University faculty members and staff held a silent vigil outside a university gate, protesting what they described as the detention of students by Immigration and Customs Enforcement. Demonstrators displayed images of Khalil and fellow student protester Mohsen Mahdawi and called for solidarity with students facing deportation. They also urged Columbia University to reopen its gates to the public after restrictions imposed during the protest movement.