



Homeland Security leaders credit the program - along with a new requirement that migrants apply for asylum first in the countries they travel through before reaching the U.S. More than 54,000 migrants have been subjected to the controversial policy known as Remain in Mexico, which took effect this year and requires most asylum seekers who are not from Mexico to wait there while the U.S. immigration system has become as the Trump administration tries to stem the flow of migrants from Central America. The difference in treatment shows how arbitrary the U.S.
