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Wayne Stanley shows his support for Sen. Richard Lugar, R-Ind, before a U.S. Senate debate Wednesday, April 11, 2012, in Indianapolis. Lugar is facing Richard Mourdock in the primary. (AP Photo/Darron Cummings)

Indiana Sen. Richard Lugar loses seat

Richard Lugar, the longest-serving Republican in the Senate, was defeated May 8 as Indiana Republicans chose state Treasurer Richard Mourdock over Lugar as the party's nominee.