But a few months ago, the releases from the privately run Immigration and Customs Enforcement detention center here slowed to maybe five a day. Now, releases from the approximately 1,200-bed GEO ICE facility have slowed even further as the Trump administration clamps down on people accused of living illegally in the United States.

The Trump administration’s policy of deporting people to countries where they are not citizens represents a sharp change for the United States, where such expulsions have been rare. But other countries have tried similar policies.