Immigration advocates just sued the Department of Homeland Security over its "Remain in Mexico" policy CBS NewsTrump administration sends back first migrant families to Mexico | TheHill The HillU.S. sends first families to Mexico to await asylum, rights groups sue ReutersImmigration advocates sue DHS over "Remain in Mexico" CBS NewsLawsuit challenges Trump plan keeping asylum-seekers in Mexico until case decided USA TODAYView full coverage on Google News