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NEW YORK, NY - APRIL 08: Ben Carson attends the National Action Network (NAN) national convention at the Sheraton New York Times Square Hotel on April 8, 2015 in New York City. The network, founded by the Rev. Al Sharpton in 1991 is hosting various politicians, organizers and religious leaders to talk about the nation's most pressing issues. The conservative Carson is widely rumored to be considering a GOP presidential run in 2016. (Photo by Andrew Burton/Getty Images)

NEW YORK, NY - APRIL 08:  Ben Carson attends the National Action Network (NAN) national convention at the Sheraton New York Times Square Hotel on April 8, 2015 in New York City. The network, founded by the Rev. Al Sharpton in 1991 is hosting various politicians, organizers and religious leaders to talk about the nation's most pressing issues. The conservative Carson is widely rumored to be considering a GOP presidential run in 2016.  (Photo by Andrew Burton/Getty Images)