Mahmoud Khalil's legal team announced Friday it will ask the U.S. Supreme Court to block his deportation, hours after the 3rd Circuit Court of Appeals refused to reconsider a ruling that moved the Columbia University activist closer to removal from the country. The 6-5 split decision in Philadelphia handed the Trump administration another win in one of the most closely watched immigration cases in the nation.
The narrow margin tells you something about where the legal establishment stands. Five judges wanted to take up the case. Six said no. That single vote kept intact an earlier ruling that found a federal district judge lacked jurisdiction to order Khalil's release from immigration detention, a finding that strips the lower courts of authority to second-guess the executive branch on this particular detainee.
Now the case heads to the highest court in the land, where Khalil's lawyers say they will seek an immediate stay preventing the government from deporting him while the justices decide whether to hear his appeal. Just the News reported Friday evening that it was not yet clear when the petition would be filed.
Khalil, a Syrian-born activist, helped organize a pro-Palestinian student encampment at Columbia University that produced what has been described as a number of disturbances. He was arrested in March 2024 after engaging in that activism, Reuters reported, and the Trump administration moved to deport him.
A federal judge in New Jersey ordered Khalil's release from immigration detention in June 2025. The Trump administration appealed. In January 2026, a three-judge panel on the 3rd Circuit ruled 2-1 that the district court had no jurisdiction over the matter, that immigration detention cases belong in the immigration court system, not in federal district court.
That January ruling was the one Khalil's team asked the full 3rd Circuit to reconsider. On Friday, the full court declined, 6-5.
The Justice Department's Board of Immigration Appeals had already ruled in April that Khalil is subject to deportation, the New York Post reported. That administrative finding, combined with the appeals court's refusal to intervene, leaves Khalil with one avenue: the Supreme Court.
Brett Max Kaufman, a senior counsel with the ACLU who represents Khalil, framed the case as a First Amendment matter, not merely an immigration dispute. He cast the deportation effort as retaliation for political speech the government dislikes.
"Federal courts must have the power to step in when the government exploits our country's immigration system to punish people for their constitutionally protected speech."
Kaufman went further, warning that the case sets a precedent beyond Khalil himself.
"If the Trump administration can target, arrest, detain, and deport Mahmoud for his speech, they can do it to anyone expressing an opinion they disagree with."
That argument, that the government is weaponizing immigration enforcement to silence dissent, is the core of the legal team's pitch. It is a claim, not a finding. No court has ruled that the deportation is retaliatory. What courts have found, so far, is that the federal judiciary lacks jurisdiction to release Khalil from immigration detention through the channel his lawyers chose.
The Supreme Court is already navigating a heavy docket of consequential Trump-era cases, and Khalil's petition would land in the middle of that workload.
Judge Cheryl Ann Krause, who dissented from the 3rd Circuit's refusal to rehear the case, offered a pointed critique of her colleagues' reasoning. The Associated Press quoted her dissent directly:
"The Judicial Branch...cannot fulfill its role as a check on the other branches of government, if we write ourselves out of relevance and leave the Executive Branch to check itself."
It is a serious argument about the separation of powers. But it is also an argument that lost, 6-5. The majority evidently concluded that Congress designed the immigration system with its own review process, one that runs through immigration judges and the Board of Immigration Appeals, not through federal district courts.
The January panel ruling made that reasoning explicit. Judges Thomas Hardiman and Stephanos Bibas wrote that "the scheme Congress enacted governing immigration proceedings provides Khalil a meaningful forum in which to raise his claims later on in a petition for review of a final order of removal," as Reuters reported.
In other words: Khalil has a path to judicial review. It just isn't the one his lawyers wanted.
Khalil's case is one of several high-profile deportation matters that have drawn national attention. His legal team and allied organizations, including the Center for Constitutional Rights, have cast the proceedings as part of a broader crackdown on political dissent.
Baher Azmy of the Center for Constitutional Rights described the situation in stark terms, telling the New York Post that the ruling "green-lights holding someone in prolonged, brutal detention conditions without access to meaningful judicial review in order to punish them and deter others from dissenting from US foreign policy."
That characterization deserves scrutiny. The 3rd Circuit did not rule on the conditions of Khalil's detention or on whether the deportation itself is lawful. It ruled on jurisdiction, on which courts get to hear the case and when. The distinction matters, even if Khalil's advocates prefer to blur it.
The Trump administration has faced judicial resistance on multiple immigration fronts. A separate D.C. Circuit ruling blocked a Trump asylum executive order on different legal grounds, and the Supreme Court has shown internal divisions over deportation protections in other cases.
Khalil's attorneys expect to file their Supreme Court appeal in late summer, Newsmax reported. Kaufman told reporters: "Today's decision is not the final word, and we still strongly believe in our arguments going forward."
Strip away the rhetoric and the case comes down to a straightforward question: Can a non-citizen use the federal courts to block deportation proceedings by arguing that the government's motive is to punish speech? Or does the immigration system's own review process handle that claim?
Six judges on the 3rd Circuit said the latter. Khalil's team wants nine justices to say otherwise.
The Supreme Court has already appeared divided on related questions of executive power and immigration enforcement. How the justices handle Khalil's petition, whether they grant a stay, take the case, or decline to hear it, will signal how much room the judiciary intends to give the executive branch on deportation.
There are real open questions here. The specific legal basis for Khalil's deportation order has not been detailed publicly in the available record. The exact timeline for the Supreme Court filing remains unclear. And the justices who would ultimately decide whether to grant a stay have given mixed signals on immigration authority in recent terms.
What is not in question is the procedural posture: Khalil has lost at every level so far. A district judge's order releasing him was overturned. The full appeals court declined to revisit that reversal. The Board of Immigration Appeals found him deportable. His lawyers are running out of courtrooms.
The justices' individual stances on immigration enforcement will matter enormously if the petition reaches conference. But the legal team's framing, that this is about free speech, not immigration law, asks the Court to do something courts have historically been reluctant to do: override the immigration system's own process based on a claim about motive.
Khalil's advocates want this to be a First Amendment case. The government wants it to be an immigration case. So far, the courts have agreed with the government.
If the Supreme Court takes it up, the question won't just be whether Mahmoud Khalil stays or goes. It will be whether every deportation proceeding can be rerouted into federal court the moment a lawyer alleges a speech motive. That's a door the justices should think long and hard before opening.