Trump says he's replacing DHS Secretary Kristi Noem with GOP Sen. Markwayne Mullin

WASHINGTON (AP) — President Donald Trump on Thursday fired his embattled Homeland Security Secretary Kristi Noem and said he will nominate in her place Oklahoma Republican Sen. Markwayne Mullin. Trump made the announcement on social media on Thursday, two days after Noem faced a grilling on Capitol Hill from GOP members as well as Democrats. [...]