WASHINGTON, DC - MARCH 18: U.S. Sen. Markwayne Mullin (R-OK) arrives to testify during a confirmation hearing to be the next Secretary of the Department of Homeland Security in the Dirksen Senate Office Building on March 18, 2026 in Washington, DC. President Trump nominated Mullin to replace Kristi Noem as DHS Secretary. (Photo by Anna Moneymaker/Getty Images)