The Uniparty only represents about about 10% of the countries electorate. Any one could see a Nationalist was going to come along eventually and tip overturn the apple cart. The only shock is how fast it happened, not whether it happened.
Scott Adams has said many times that Trump will appear to be running unopposed by October and that the word landslide will be used often to describe his presidency.
25% of Bernie Sanders have said they will never vote for Hillary and given a choice between Trump and Clinton 30% said they will vote for Trump.
That spells landslide.