Trump fires Kristi Noem as DHS chief, names Sen. Markwayne Mullin to replace her

President Trump fired Homeland Security Secretary Kristi Noem and said GOP Sen. Markwayne Mullin of Oklahoma would replace her.

Noem "will be moving to be Special Envoy for The Shield of the Americas, our new Security Initiative in the Western Hemisphere we are announcing on Saturday in Doral, Florida," Trump posted on social media. "I thank Kristi for her service at 'Homeland.'"

Noem is the first cabinet secretary to leave the Trump administration in the second term. The announcement comes after Noem spent two days being grilled by lawmakers in Congress over her leadership.