Kristi Noem will be replaced as the Secretary of Homeland Security, President Donald Trump announced on Thursday, March 5, and will be succeeded by Oklahoma Sen. Markwayne Mullin.
"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, 2026," Trump said in a social media post.
In the post, Trump called Mullin, a Republican, a "MAGA Warrior," referencing his professional mixed martial arts career and his identity as the only Native American in the Senate.
"Markwayne will make a spectacular Secretary of Homeland Security," Trump said. Noem will be moved to a yet-to-be announced security initiative called "The Shield of the Americas."
Here's what to know about Mullin.
