Episode 24 · October Term 2025 · June 29, 2026 · 00:35:21

Mullin v. Al Otro Lado

The Court holds that an alien standing in Mexico does not "arrive in the United States" by attempting, and failing, to set foot in this country — an alien arrives only when he crosses the border. As a result, the Immigration and Nationality Act neither entitles an alien stopped on the Mexican side of the border to apply for asylum nor requires an immigration officer to inspect him.

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Case
Mullin v. Al Otro Lado
Author
Justice Alito
Docket
25-5
Decided
2026-06-25
Opinion
Read on supremecourt.gov →

Case background

The Immigration and Nationality Act governs the process by which an alien who “arrives in the United States” is inspected by border officials, is deemed an applicant for admission, and may apply for asylum. In the spring of 2016, U.S. Customs and Border Protection began experiencing a surge of aliens seeking admission at ports of entry along the U.S.-Mexico border, with numbers sometimes far exceeding safe and secure processing capacity. In November 2016, the Department of Homeland Security responded by adopting a policy of “metering” the number of arriving aliens whom CBP would inspect each day and allow to apply for asylum; to enforce it, officials stood on the U.S. side of the border and prevented aliens from entering beyond the number the port could adequately process. In 2017, asylum seekers and the immigration-advocacy organization Al Otro Lado brought a putative class action against the Government, arguing that CBP’s enforcement of the metering policy unlawfully withheld inspection and asylum processing from aliens who arrive at the border and seek to enter the United States. The District Court certified a class and granted summary judgment for it, and a divided panel of the Ninth Circuit affirmed in relevant part, holding that an alien “arrives in the United States” — and thus must be inspected and may apply for asylum — when the alien, while standing on the Mexico side of the border, encounters a United States official at the border.

Questions Presented

(1) The Immigration and Nationality Act, 8 U.S.C. 1101 et seq., provides that an alien who “arrives in the United States” may apply for asylum and must be inspected by an immigration officer. 8 U.S.C. 1158(b)(1)(A), 1225(a)(1) and (3). The question presented is whether an alien who is stopped on the Mexican side of the U.S.-Mexico border “arrives in the United States” within the meaning of those provisions.

Holding

An alien standing in Mexico does not “arrive in the United States” by attempting, and failing, to set foot in this country. An alien “arrives in the United States” only when he crosses the border. The INA thus neither entitles an alien standing in Mexico to apply for asylum nor requires an immigration officer to inspect him. The phrase “arrives in the United States” carries its ordinary meaning — a person arrives in a place only when he enters it — and that conclusion does not change because someone or something blocks entry. Statutory context, and the presumption against extraterritoriality, both confirm that reading.

The Court

Justice Alito delivered the opinion of the Court, in which Chief Justice Roberts and Justices Thomas, Gorsuch, Kavanaugh, and Barrett joined. Justice Thomas filed a concurring opinion. Justice Sotomayor filed a dissenting opinion, in which Justices Kagan and Jackson joined. Justice Jackson filed a dissenting opinion.

What this episode contains

This episode is an AI-narrated reading of the majority opinion in Mullin v. Al Otro Lado, written by Justice Alito.

AI disclosure: The voice in this episode is AI-generated, using a machine learning model styled to loosely resemble the authoring justice. Tone, inflection, pacing, and emphasis are artifacts of the model and should not be attributed to Justice Alito. The text being read is the Court’s published majority opinion, lightly adapted to improve readability for the spoken format.