Then-Attorney General Jeff Sessions visits California in April 2017. Department of Justice Inspector General Michael Horowitz has released a critical review of Sessions’ 2018 zero tolerance policy on people trying to cross the Southwest border.

OTAY MESA, CA – APRIL 21: Department of Homeland Security John Kelly and Attorney General Jeff Session speak to the media during a tour of the border and immigrant detention operations at Brown Field Station on April 21, 2017 in Otay Mesa, California. Secretary Kelly and Attorney General Sessions are on the second leg of a tour together this week after visiting El Paso and were joined by U.S. Senator Ron Johnson, Chairman of the Senate Committee on Homeland Security and Governmental Affairs.(Photo by Sandy Huffaker/Getty Images)