Your statement is why Trump's candidacy, and hopefully him winning, is so important. Trump has the capacity to alter the voting behavior of many demographics. This single election could potentially realign the entire political landscape and alter the alter the propensity for specific demographics to vote in a particular way. No other candidate running was capable of doing this.
Maybe. But for 2016 Trump will win if he can really get out more of the white working class that has either sat out past elections or been more evenly split with Democrats, and get the usual Republican edge with middle-class, college educated whites. Unfortunately the latter group seems to among the most susceptible to mainstream media bias.