Daniel Roque Olivares was driving to work on U.S. Highway 81 in Oklahoma when a state trooper pulled him over and detained him for violating federal immigration laws. The stop is part of a broader crackdown enabled by training all 700 Oklahoma Highway Patrol troopers in immigration enforcement, an effort led by former Highway Patrol major Lance Schroyer, Trump's nominee to head ICE, who was himself deputized to make arrests after a 40-hour training course. State officials say local agencies like the Highway Patrol are essential to the administration's deportation efforts. Schroyer's nomination has yet to receive a Senate confirmation hearing amid reported friction between Homeland Security Secretary Markwayne Mullin, to whom he is close, and the Trump administration.