President Joe Biden is proving impervious to calls for stronger enforcement measures at the southern border, even as record numbers of migrants have crossed since he took office.

The Biden administration is ending the Migrant Protection Protocols, better known as “Remain in Mexico,” a program initiated under then-President Donald Trump in 2019 that required non-Mexican migrants to wait for their asylum hearings in Mexico rather than in the United States. The Department of Homeland Security says it will end the program quickly now that it has a judge’s blessing.