Officials at the Department of Homeland Security and the Defense Department are racing to set up multiple tent facilities in Guantanamo Bay, Cuba, to house thousands of migrants, but the scattered efforts have prompted questions internally about who’s in charge and what will happen once people arrive on site.

WASHINGTON—Homeland Security Secretary Kristi Noem made a trip Friday to Guantanamo Bay, as the Trump administration steps up use of the naval base in seeking to emphasize toughness against migrants it says have criminal backgrounds.