The Department of Homeland Security is targeting immigrants who have sought assistance from food stamps, welfare, Medicaid, Medicare Part D, and housing vouchers; there is wide variation among ketamine clinics, including the screening of patients, dosages, frequency of infusions, and coordination with patients’ mental health providers; public health advocates are upset over a decision by the Trump administration to divert nearly $200 million from health programs to fund the detention of unaccompanied migrant children who crossed into the country illegally.