Indiana Sen. Richard Lugar loses seat

Associated Press
Sen. Richard Lugar responds to a question outside of a voting location Tuesday, May 8, 2012, in Greenwood, Ind. Lugar is being challenged by two-term state Treasurer Richard Mourdock. (AP Photo/Darron Cummings)

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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.

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