WASHINGTON, DC - MARCH 18: General President of the International Brotherhood of Teamsters Sean O'Brien arrives for a confirmation hearing for U.S. Sen. Markwayne Mullin (R-OK) 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)