Source?
News release for November 5, 2015: The doctor is ‘in’ in the Tar Heel State:
“Retired neurosurgeon Dr. Ben Carson commands a double-digit lead over his nearest competitor in North Carolina’s Republican presidential primary race, according to the latest Elon University Poll, and he trumps former Secretary of State Hillary Clinton in a hypothetical matchup in next fall’s general election.”
Carson double digit lead over Trump.