One of the top ⁠officials overseeing Donald Trump’s immigration crackdown, Homeland Security Secretary Kristi ⁠Noem, will leave her role, the US president said on Thursday, a major staffing move that raises questions about the direction of the Republican president’s immigration agenda. “I am pleased to announce that the Highly Respected United States Senator from the Great State of Oklahoma, Markwayne Mullin, will become the United States Secretary of Homeland Security (DHS), effective March 31,...