Who said anything about reality being a Darwinist paradigm. There are many reasons that do explain how an intellectual dwarf like Trump rose to the top of the toilet bowl that is the Republican party and managed to stay afloat. 
Trump cannot win the presidency because he's not expanding the Republican party thus the Republicans will be in the same situation they've been in the last two presidential elections. Trump's already dead in the water just like the Republicans, he just doesn't know it yet. 
It will be incredibly difficult for him to save face having gotten his bottom beaten by a woman like HRC but that'll be something he and his psychiatrist or Glock work out for themselves. Obviously, I favor the latter.