Dr. Ben Carson lied (which by Hilary's standards, should only increase his popularity), but since he's not a Democrat, lying will actually cost him. I wouldn't be surprised to see him drop out within the next couple months.
Some things you can recover from, but not this. If by some freak chance he wins the GOP primary, this will be repeated until it becomes a fixed part of the American lexicon.
Ben Carson admits fabricating West Point scholarship - POLITICO