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Trump picks Elaine Chao for Transportation secretary

US Secretary of Labor Elaine Chao talks with fellow Cabinet members prior to the ceremonial swearing-in of the new Director of the Office of Management and Budget Jim Nussle in the Eisenhower Executive Office Building next to the White House in Washington, DC, 10 September 2007.          AFP PHOTO/Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)

US Secretary of Labor Elaine Chao talks with fellow Cabinet members prior to the ceremonial swearing-in of the new Director of the Office of Management and Budget Jim Nussle in the Eisenhower Executive Office Building next to the White House in Washington, DC, 10 September 2007. AFP PHOTO/Saul LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)

WASHINGTON, D.C. — President-elect Donald Trump has chosen Elaine Chao, the former Labor secretary and wife of Senate Majority Leader Mitch McConnell, to be his choice for Transportation secretary, an official briefed on the matter told CNN on Tuesday.

The announcement is expected to come this afternoon.