<page_title> United States Secretary of Homeland Security </page_title> <section_title> List of Secretaries of Homeland Security </section_title> <table> <cell> Elaine Duke (born 1958) Acting <col_header> Secretary of Homeland Security </col_header> </cell> <cell> July 31, 2017 <col_header> Took office </col_header> </cell> <cell> December 6, 2017 <col_header> Left office </col_header> </cell> </table>
Elaine Duke served as acting secretary of Homeland Security from July 31, 2017to December 6, 2017.