The court in an unsigned order sent the case back to the United States Court of Appeals for the 9th Circuit with instructions to toss the case out as moot. The court yanked oral arguments for the case in February shortly after Biden announced that he planned to wind down the policy. The Justice Department at the time asked the justices to toss the case.
The case sought to invalidate Trump’s “Remain in Mexico” policy, which was implemented in 2019 by the Department of Homeland Security. Under it, asylum-seekers were forced to wait in Mexico until immigration courts concluded their hearings. About 68,000 people were detained in Mexico under the policy, according to the DHS.