The United States Department of Homeland Security is the U.S. federal executive department responsible for public security, comparable to interior ministries abroad. Its missions involve anti-terroris
Headquarters of the U.S. Department of Homeland Security in Washington D.C.
A U.S. Customs and Border Protection officer addresses Vice President Dick Cheney (center); Saxby Chambliss (center right), a U.S. Senator from Georgia; and Michael Chertoff (far right), the second head of the DHS; in 2005
President George W. Bush signs the Homeland Security Appropriations Act of 2004 on October 1, 2003.
U.S. CBP Office of Field Operations officer checking the authenticity of a travel document at an international airport using a stereo microscope
Markwayne Mullin
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Markwayne Mullin is an American politician and businessman who has served since 2026 as the ninth United States secretary of homeland security. A member of the Republican Party, Mullin served from 202
United States Department of Homeland Security
…Kristi Noem (January 25, 2025 – March 31, 2026) Markwayne Mullin (Mar 24, 2026 – present) The department has been dogged by persistent criticism over excessive bureaucracy, waste, ineffectiveness and lack of transparency…
Official portrait, 2026
Official 114th Congress portrait, 2015
Official Senate portrait, 2022
Mullin (left) with president Donald Trump (center) and Senate majority leader John Thune (right) in July 2025