FILE - In this June 17, 2018, file photo, provided by U.S. Customs and Border Protection, people who have been taken into custody related to cases of illegal entry into the United States, sit in one of the cages at a facility in McAllen, Texas. Advocates were shocked to find an underage mom and her tiny, premature newborn daughter huddled in a Border Patrol facility this week in what they say was another example of the poor treatment immigrant families receive after crossing the border. The mother is a Guatemalan teen who crossed the border without a parent and was held at a facility in McAllen, Texas. (U.S. Customs and Border Protection's Rio Grande Valley Sector via AP, File)