Sen. Thad Cochran, center, R-Miss., listens as officials of Siemens' Energy Sector talk about their plant prior to a tour in Richland, Miss., Wednesday, June 11, 2014, during Cochran's campaign swing ... more 
Sen. Thad Cochran, center, R-Miss., listens as officials of Siemens' Energy Sector talk about their plant prior to a tour in Richland, Miss., Wednesday, June 11, 2014, during Cochran's campaign swing through central Mississippi. Cochran is in a tight runoff race for the Senate GOP nomination with state Sen. Chris McDaniel. (AP Photo/Rogelio V. Solis) less 
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Associated Press | Photo By Rogelio V. Solis
Wed, Jun 11, 2014 6:15 PM EDT