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)

Sean O'Brien (R), General President of the International Brotherhood of Teamsters, looks 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)

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)

Displayed on a screen, committee chairman US Senator Rand Paul, Republican from Kentucky, speaks as 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)