Sen. Mary Landrieu of Louisiana speaks to supporters as she concedes defeat in her runoff election against Rep. Bill Cassidy, a Republican on Saturday, Dec. 6, 2014. (AP Photo/Gerald Herbert)
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Sen. Mary Landrieu of Louisiana speaks to supporters as she concedes defeat in her runoff election against Rep. Bill Cassidy, a Republican on Saturday, Dec. 6, 2014. (AP Photo/Gerald Herbert)
