“So...why is he doing this?”
1) Conspiracy Theory: Trump isn’t in the race to win. He wants (fill in the blank).
2) Human Nature Theory: It’s “Trump being Trump”.
Conspiracies can be real but advocating one can make one look silly because they are difficult to prove. I’ll take #2. Human beings have individual tendencies and Trump strikes me as a person who doesn’t take much advice. I’m guessing that the “natural born” strategy is just Trump following his instincts.
Well he has good instincts!