Republican lawmakers are celebrating President Donald Trump’s choice to tap Sen. Markwayne Mullin (R-OK) as Homeland Security Secretary Kristi Noem’s replacement while thanking Noem for her leadership.

Trump announced Noem’s firing on Truth Social on Thursday afternoon, designating her as the new “Special Envoy for The Shield of the Americas,” a new Western Hemisphere security initiative. He announced “MAGA Warrior” Mullin as Noem’s replacement, saying he “truly gets along well with people, and knows the Wisdom and Courage required to Advance our America First Agenda.”