He is an auto tuned pop song.
Empty, boring, meaningless, repetitive, skin deep, exactly the sort of inoffensive pap that appeals to the very average. Throw in some phony liberal niceness and spread some borrowed money around, and you have a winner.
His brand is being all things to all people while not actually being anything to anyone, that way he can appeal to the majority who aren't smart enough to know better.
Of course others vote liberal because they pay best, but that's nothing new.