Former Homeland Security Secretary Kristi Noem is no longer serving as the Trump administration's special envoy for the Shield of the Americas initiative, a State Department official said Thursday, though she remains involved in the administration's efforts to coordinate security cooperation across the Western Hemisphere.

"Kristi Noem's envoy status expired last month and she is no longer in the role," a State Department official told CBS News Thursday. "She is now a senior advisor to Deputy Secretary Landau and continues to work on the Shield of the Americas portfolio." 

The Shield of the Americas is a coalition made up of the United States and several Caribbean and Latin American countries established by the Trum...