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Janet Napolitano is the third United States Secretary of Homeland Security. Assuming this position on January 21, 2009, she is the first woman to serve in that office. An American politician from the Democratic Party, Napolitano was serving as governor of the state of Arizona when designated by then-President-elect Barack Obama to be his Homeland Security Secretary. She was confirmed by the Senate and sworn in one day after Obama's inauguration.
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