Department of Homeland Security Secretary Markwayne Mullin has become preoccupied with an idea to punish cities and states that do not cooperate with federal immigration enforcement — cutting customs staffing at their airports and possibly stopping the processing of international travelers all together.
But the ambitious plan is hitting turbulence: It has sent the travel industry and local officials reeling because of its disruptive potential, has been publicly opposed by a fellow Cabinet secretary, and has not yet been greenlit by the White House.
