WASHINGTON: Should Sen. Markwayne Mullin be approved as the next secretary of Homeland Security, he will walk into the department’s sprawling Washington, D.C., campus with his work cut out for him. Immigration enforcement is at a crossroads. Disaster-hit states and their lawmakers are angry at delayed federal assistance. Frustrated travelers face long airport security lines due to a monthlong funding battle in Congress.

Sen. Markwayne Mullin faces a confirmation hearing for DHS secretary amid controversies over immigration, a partial shutdown, and disaster relief.

WASHINGTON: Should Sen. Markwayne Mullin be approved as the next secretary of Homeland Security, he will walk into the department’s sprawling Washington, D.C., campus with his…