U.S. Sen. Mitch McConnell, right, and his wife, former Labor Secretary Elaine 

U.S. Sen. Mitch McConnell, right, and his wife, former Labor Secretary Elaine Chao, speak with supporters at a Republican dinner in Winchester, Ky., on Saturday, March 2, 2013. A liberal political group had made an issue of Chao’s ethnicity in messages distributed on Twitter earlier this month.  (AP Photo/Roger Alford)
Associated Press
U.S. Sen. Mitch McConnell, right, and his wife, former Labor Secretary Elaine Chao, speak with supporters at a Republican dinner in Winchester, Ky., on Saturday, March 2, 2013. A liberal political group had made an issue of Chao’s ethnicity in messages distributed on Twitter earlier this month. (AP Photo/Roger Alford)
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