WASHINGTON, DC - JANUARY 11:  Freshman Sen. Tammy Duckworth (D-IL) prepares for the Senate Commerce, Science and Transportation Committee's confirmation hearing for Elaine Chao to be the next U.S. secretary of transportation in the Dirksen Senate Office Building on Capitol Hill January 11, 2017 in Washington, DC. Chao, who has previously served as secretary of the Labor Department, was nominated by President-elect Donald Trump.  (Photo by Chip Somodevilla/Getty Images)