A week earlier, some lawmakers were denied entry to the Adelanto ICE Processing Center, where detainees from recent raids are being held.

U.S. Immigration and Customs Enforcement said the former Baldwin prison is "set to start accepting detainees."

"I saw no deplorable living conditions here. This is not the Ritz-Carlton. It is a detention center. But there's nothing inhumane about what's going on," Gimenez said.

Migrant families with young children, including toddlers, were held for days and sometimes weeks in US Customs and Border Protection facilities, some with jail-like conditions, according to interviews conducted by attorneys tied to immigrant advocacy groups and submitted Tuesday in federal court.

On Tuesday, the representative toured the Federal Detention Center in downtown Miami - a Federal Bureau of Prisons facility housing immigrants under the custody of U.S. Immigration and Customs Enforcement - after the Miami Herald published an investigation into reports of harsh conditions,

Moshannon Valley Processing Center, a large ICE detention facility in west-central Pennsylvania, has drawn many civil rights complaints.

Four detainees have escaped from a federal immigration detention center in New Jersey, which has been the center of protests since its opening in May and where both a sitting congresswoman and Newark’s mayor have been arrested.

A 19-year-old University of Utah student was detained by immigration agents last week while traveling in Colorado and is now being held at an immigration center there.