Trump to nominate Elaine Chao for transportation post: source

U.S. Senate Minority Leader Mitch McConnell (R-KY) waves to supporters with his wife, former United States Secretary of Labor Elaine Chao, at his midterm election night rally in Louisville, Kentucky, November 4, 2014. REUTERS/John Sommers II

WASHINGTON (Reuters) - President-elect Donald Trump plans to nominate former Labor Secretary Elaine Chao to head the Transportation Department, a source with knowledge of the decision said on Tuesday.

The source, who requested anonymity, confirmed the pick to Reuters. Chao, the wife of Republican Senate Majority Leader Mitch McConnell, served as labor secretary under President George W. Bush and was the first Asian-American woman to hold a Cabinet position. The formal announcement was expected Tuesday afternoon.