Remain in Mexico (2019-2022)
The Trump administration sent tens of thousands of asylum seekers to Mexico to await US court hearings, arguing it deterred illegal immigration. Migrants waited in dangerous border cities with limited legal access.
The policy was challenged in court and ended under Biden, then briefly reinstated by court order in 2021.
The Supreme Court allowed Biden to terminate it in 2022, but the policy showed how far the executive could push third-country processing.
Like third-country deportations, it sent people to places they had no ties to, raising due process concerns that courts ultimately weighed.
