The Supreme Court ruled 6-3 for the Trump administration in Mullin v. Al Otro Lado, reviving a border metering policy that can limit how many asylum seekers are processed at U.S.-Mexico ports of entry. The decision overturns a lower-court block and could push more migrants to wait in Mexico while DHS and CBP decide how to respond.
The Supreme Court ruled 6-3 on June 25, 2026, in a decision that clears the way for the Trump administration to revive a border metering policy limiting how many asylum seekers can be processed at U.S.-Mexico ports of entry.
The ruling overturns a lower-court block and could narrow access to asylum processing for people waiting on the Mexican side of the border. It also revives a long-running dispute over whether someone standing outside the United States has legally “arrived” for asylum purposes.
Justice Samuel Alito wrote the majority opinion. Justices Sonia Sotomayor, Elena Kagan and Ketanji Brown Jackson dissented.
What the court decided
The majority held that migrants still on the Mexican side of the border had not “arrived in the United States” under the asylum statute until they physically crossed into U.S. territory.
That interpretation gives federal officials more room to limit daily processing at ports of entry when they say capacity is strained. In practice, it restores legal support for a policy often described as metering or turn-back.
AP reported that the ruling overturned a lower-court order that had blocked the practice. Axios reported that the Department of Homeland Security welcomed the outcome and said it vindicated the view that physical presence matters for asylum processing.
The case centers on how the Immigration and Nationality Act applies to people seeking asylum at a port of entry while physically outside U.S. territory. The legal question is whether someone waiting at the border has reached the point where asylum processing must begin.
How the fight reached the court
The case traces back to a 2017 challenge by Al Otro Lado and asylum seekers affected by the policy. They argued that restricting how many people could be processed at ports of entry unlawfully blocked access to asylum.
The policy itself was not new. It had been used under the Obama administration, expanded under Trump, and then rescinded by the Biden administration in 2021.
That history matters because the court was not creating a fresh border practice. It was deciding whether the federal government could return to a system that had already been used, dropped and litigated for years.
The ruling also reflects a broader shift in who controls the pace of asylum intake at the border. By lifting the judicial block, the court gave the executive branch more room to manage processing through border operations rather than through the courts.
Why it matters
The decision strengthens executive control over how asylum claims are handled at official crossings. It also makes the border wait itself more consequential, because people blocked from processing at a port of entry may have to remain in Mexico while they look for another chance to present a claim.
Advocates have warned that waiting in Mexico can expose asylum seekers to violence and unsafe conditions. The Guardian reported that critics said the ruling could deepen those humanitarian risks if the policy is revived.
For the administration, the case is about physical presence and border control. For advocates, it is about whether a lawful port of entry remains a realistic path to seek protection.
The stakes are not only legal but practical. If metering returns, fewer people could be accepted for processing on any given day, and asylum seekers may face longer waits and less predictable access to the system.
What happens next
The immediate next question is operational. DHS and Customs and Border Protection will have to decide whether to reissue guidance, how quickly to restart metering, and whether it will apply at specific crossings right away.
Another open issue is whether the ruling will trigger new litigation over implementation details or broader restrictions that follow. The long history of the case suggests that any restart could lead to another round of court challenges.
The research packet also flags a basic question of pace: whether CBP will move quickly at specific border crossings or roll out changes in stages. That will determine how immediately the ruling affects asylum seekers on the ground.
For now, the Supreme Court’s order removes the lower-court block and gives the Trump administration room to restore a policy that can sharply limit how many asylum seekers are processed at ports of entry.
Revision note
Initial automated publication.