An Economist/YouGov poll last Friday showed that Donald Trump is now 28% of registered Republican voters 1st choice, up from 15% in early July.
a) Novelty. Remember Herman Cain soared in the polls early on too, mostly for also shooting his mouth off.
b) The GOP rank and file is an aging, and slightly/largely deranged demographic.
c) They are fed up with lame candidates like McCain and Romney (although this is hardly the solution to that).
d) Sending a message to the others.
e) People love rich guys. Sure, most of the other candidates are multimillionaires, but Donald TrumpEts it.
f) They want their own, as Sarah Palin would say, "mavericky" candidate like Bernie Sanders.