it is using this case to establish a truly chilling proposition: that no one can stop the Trump administration from imprisoning anyone it wants anywhere else in the world. In its brief to the Supreme Court, the administration argues that the only remedy available to a person in custody is a writ of habeas corpus, a court order that a person in custody be brought before the court to determine if the detention is lawful. But the administration also contends that federal courts have no authority to issue such a writ when the person is held in a foreign prison.