WASHINGTON, DC - MARCH 18: Chairman Sen. Rand Paul (R-KY) delivers an opening statement during 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)

WASHINGTON, DC - MARCH 18: A detailed view of the boots worn by U.S. Sen. Markwayne Mullin (R-OK) 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)

WASHINGTON, DC - MARCH 18: A detailed view as U.S. Sen. Markwayne Mullin (R-OK) holds a rubber ball 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 Chip Somodevilla/Getty Images)

Christine Mullin (R) and Sean O'Brien (center R), General President of the International Brotherhood of Teamsters, look on as US Senator Markwayne Mullin (R-OK), nominee to be Secretary of Homeland Security, testifies during a Senate Committee on Homeland Security and Governmental Affairs confirmation hearing on Capitol Hill in Washington, DC, on March 18, 2026. (Photo by Oliver Contreras / AFP via Getty Images)

US Senator Markwayne Mullin (R-OK), nominee to be Secretary of Homeland Security, testifies during a Senate Committee on Homeland Security and Governmental Affairs confirmation hearing on Capitol Hill in Washington, DC, on March 18, 2026. (Photo by Oliver Contreras / AFP via Getty Images)

US Senator Markwayne Mullin (R-OK), nominee to be Secretary of Homeland Security, testifies during a Senate Committee on Homeland Security and Governmental Affairs confirmation hearing on Capitol Hill in Washington, DC, on March 18, 2026. (Photo by Oliver Contreras / AFP via Getty Images)

WASHINGTON, DC - MARCH 18: White House press secretary Karoline Leavitt walks into the West Wing after speaking to reporters on the North Lawn of the White House on March 18, 2026 in Washington, DC. Leavitt took questions on NATO allies, Tulsi Gabbard, and the timeline for U.S. President Donald Trump's upcoming China trip, among other topics. (Photo by Andrew Harnik/Getty Images)

Senator Markwayne Mullin (R-OK), nominee to be Secretary of Homeland Security, is sworn in during a Senate Committee on Homeland Security and Governmental Affairs confirmation hearing on Capitol Hill in Washington, DC, on March 18, 2026. (Photo by Oliver Contreras / AFP via Getty Images)