WASHINGTON, DC - MARCH 18: U.S. Sen. Markwayne Mullin (R-OK) leaves at the conclusion of the public portion of his confirmation hearing to be the next Homeland Security Secretary in the Dirksen Senate Office Building on Capitol Hill on March 18, 2026 in Washington, DC. President Trump nominated Mullin to replace Kristi Noem as DHS Secretary. (Photo by Chip Somodevilla/Getty Images)