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Associated Press
File- This March 8, 2014, file photo shows Dr. Ben Carson, professor emeritus at Johns Hopkins School of Medicine, speaking at the Conservative Political Action Conference annual meeting in National Harbor, Md. Carson, a retired neurosurgeon turned conservative political star, has confirmed that he will seek the Republican presidential nomination in 2016. Carson announced his candidacy during an interview aired Sunday, May 3, 2015, by Ohio's WKRC television station  (AP Photo/Susan Walsh, File)

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