So I've just had a thought: I don't think Trump actually wants to win. i wonder if he is intentionally trying to sabotage his own campaign. He met with the Mexican president earlier today, in what appeared to be a bid to make up for all the comments he's made throughout his campaign that have alienated Mexicans and minorities in general. He called the meeting "substantive and constructive," and it actually looked like he may have managed to do damage control for all of his earlier crazy talk. BUT THEN, after the Mexican president publicly said Mexico would not pay for any wall, and after Trump himself admitted publicly that the pair had not discussed funding for a wall, Trump insisted that "Mexico will pay for the wall, 100%. They don't know it yet but they're going to pay for the wall." What?!?!?! That seems like deliberate sabotage. No way he could be that stupid. He had just succeeded in smoothing things over with Mexican voters .... and then he recklessly insulted all of Mexico and the Mexican president. For no real reason.
The only explanation I can see is that maybe he started the race with no real intention of winning .... maybe it was all a big joke and he just wanted to see if he could get voters .... and now he's trying to get out.