As an outsider who has become a top contender in the Republican presidential field, Dr. Ben Carson has attracted fresh media attention to an unusual part of his record: his ties to a dietary ...

CNBC moderator Carl Quintanilla asked Republican presidential candidate Ben Carson at Wednesday's debate about his relationship with Mannatech, a Texas-based medical supplement company "That's total ...

Carson gets mad when called out on fibs -- losing the White House is one thing, but risking book sales is another ...