Daniel Roque Olivares was driving to work on U.S. Highway 81 in Oklahoma when a state trooper pulled up behind him. Within minutes, he was in custody for violating federal immigration laws, part of a crackdown that has been harsher for unauthorized immigrants in Oklahoma than for those in almost any other state. A key leader in the enforcement effort has been Lance Schroyer, a former Oklahoma Highway Patrol major tapped by President Trump to lead U.S. Immigration and Customs Enforcement. Schroyer helped spearhead the Highway Patrol’s effort to train all of its 700 troopers to enforce immigration laws and work with ICE to arrest undocumented people, according to the Department of Homeland Security and state officials. He was deputized to make ICE arrests himself last year after completing the 40-hour online training program — a shortened effort that some say does not adequately prepare officers for the fraught world of immigration enforcement, the Washington Post reports. Oklahoma is so rural that many residents must use highways patrolled by state troopers to get to work or run errands. Tim Tipton, state Department of Public Safety commissioner, said the highway patrol is a critical partner in the Trump administration’s mass-deportation effort. “The feds can never get this done on their own. They don’t have the capacity and never will — I don’t care how many people they hire,” said Tipton, who oversees the Highway Patrol and has worked closely with Schroyer. Instead, Tipton said, ICE will need to rely on local agencies to carry out the kind of work Schroyer was involved in. “That’s why I feel like Lance is such a perfect fit.” The Senate has not confirmed an ICE director in over a decade. There are mounting signs Schroyer would face resistance clearing that hurdle. Sen. Rand Paul (R-KY), who chairs the Senate Homeland Security and Governmental Affairs Committee, has yet to schedule Schroyer’s nomination hearing. Schroyer is close to Homeland Security Secretary Markwayne Mullin, who has hit a rough patch with Trump and members of his base, many of whom accuse him of not being tough enough in advancing the deportation campaign. Democrats, immigration advocates and many members of the public, in contrast, say ICE has been unnecessarily aggressive, targeting many law-abiding immigrants who have lived in the U.S for years.