Back in the stone age, Robert Redford starred as a candidate. At the beginning of the campaign, RR worried about how he would act afterwards. His campaign manager gave him a 'guarantee'. It was a piece of paper which said "You lose".
That's the deal with Trump. He isn't going to win, so he can say whatever the hell he wants. His audiences don't care, either - they'll cheer anything that sounds dramatic and unorthodox ('telling it like it is').
Of course, in The Candidate, RR's character actually won - and didn't know what to do next.