Senate Judiciary Committee members heard from government officials on border security and immigration policy for migrant families seeking asylum in the United States and the separation of some of those families as a result of the Trump administration’s “zero tolerance” policy. Among the officials were leaders of the Immigration and Customs Enforcement, Health and Human Services, and Customs and Border Patrol agencies, one of whom told lawmakers he had warned the Trump administration of potential emotional and psychological effects for children affected by the policy.