Ben Carson says he's 'leaving campaign trail'

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Friday, March 4, 2016
Republican presidential candidate Dr. Ben Carson poses for a photograph before speaking with The Associated Press in his home in Upperco, Md., Wednesday, Dec. 23, 2015.
Republican presidential candidate Dr. Ben Carson poses for a photograph before speaking with The Associated Press in his home in Upperco, Md., Wednesday, Dec. 23, 2015.
AP Photo/Andrew Harnik

Republican presidential hopeful Ben Carson announced Friday that he is "leaving the campaign trail" and has ended his bid for the party's nomination.

He said he will become a national chairman of a group that encourages Christians to vote.