one candidate always runs for the 'shock jock' factor.
remember that crazy dem in 2008 that kept pwning everyone, some senator from 3 decades back?
and cain was pure gold... "Sure, I'll take a lie detector" with the telling smirk at the same time, everyone knew he was full of shit. He later admitted the whoring around, of course.
they sell books, they get radio and tv shows. Carson will probably be a top 10 FOX contributor in 2017.