WASHINGTON, DC - MARCH 18: U.S. Sen. Markwayne Mullin (R-OK) looks to General President of the International Brotherhood of Teamsters Sean O'Brien (not pictured) as he testifies 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)