Senator Kamala Harris (D-CA) on Monday called for Department of Homeland Security Secretary Kirstjen Nielsen to resign.
A policy referring all individuals crossing the border illegally for prosecution is a policy of separating families.
Migrant children separated from their families are bound to be distressed, but detention center staff may not hold them.
Dr. Lance Dodes said President Trump is a "sociopath" and a "very sick individual".
The United Methodist Church released a statement asking Attorney General Jeff Sessions to reverse the policy.
U.S. Border Patrol released a video Monday showing detained immigrants in cages in a McAllen, Texas holding facility.
U.S. Border Patrol wants the public to know that holding people in cages is not treating them like animals.
By August, Health and Human Services anticipates taking custody of 18,500 more children, for a total of 30,000.
A recent Ipsos poll revealed that 46 percent of Republicans agreed with using family separations as a deterrent.