What is amusing is that he goes on to prove his own point, when saying that Trump benefited from the underdog effect. The best pollsters had him at about 40% to win (538).
That is an underdog win. But far from an unexpected win.
Overall: Think sideways? No. Think for yourself.
Also if the entire world is going one way... and you think differently. Stop a moment and ask someone: Am I crazy or is the world crazy and lay out your logic. You may discover... the world is crazy.
In a world with so much cargo-culting etc. Insanity is around the bend.