Chris McDaniel Chris McDaniel

Mississippi state Sen. Chris McDaniel is expected to make his primary challenge against incumbent Republican Sen. Roger Wicker official on Wednesday. Rogelio V. Solis/AP hide caption

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Rogelio V. Solis/AP

Mississippi Sen. Thad Cochran (center) may have scored the equivalent of a winning political touchdown in the Republican primary last month, but Chris McDaniel, who lost, still wants to see the replay. Rogelio V. Solis/AP hide caption

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Rogelio V. Solis/AP