Markwayne Mullin

Markwayne Mullin is an American politician, businessman, and former mixed-martial-arts fighter serving as the 9th United States Secretary of Homeland Security since March 31, 2026. He represented Oklahoma's 2nd congressional district in the U.S. House (2013-2021) and was elected to the U.S. Senate in a 2022 special election to replace the retiring Jim Inhofe. Mullin was confirmed to replace Kristi Noem as DHS Secretary following her firing on March 5, 2026, becoming the first Cabinet secretary dismissed in Trump's second term.