Trump isn't stupid, he knows exactly what he's doing.
For example he's actually a democrat, but he realized the weird spot the republicans were in, and in addition to the fact that the competition on the democratic side was too stiff, so he decided to take advantage of that and run as a republican. He tries to appeal to the majority of america, the poor, white, working class. He knows exactly what to say to get their maximum support, and the most media attention. Everything he does is designed to draw a huge amount of media attention, which he knows how to manipulate as a reality tv star and a buissness man. He has taken complete control of the republican nomination, because he knows that the media just wants money. So he says ridiculous things, the media bugs out at the money they're gonna make, and Trump gets a lot of publicity (there's no such thing as bad publicity). For example Trump decided against going to a big republican debate [i]very publicly.[/i] Since Trump had the media attention, the other candidates knew that beating Trump had to be done. So they made their arguments to be tailored against Trump. Trump realized this and decided not to go, getting him more publicity and leaving everyone else floundering.
In addition he has successfully ran a large business for quite some time. This isnt even the first time he's run for president. In 2002 he did a small exploratory campiagn, probably to start mapping his main campaign, this one.
If Trump get's elected, he'll probably drop his masterful act. He might put a motion in congress to build a wall, fully aware of the fact that that would never pass, to appease the people who wanted that crap.
In addition i doubt he would be as disastrous for our global relations as some may think. For one, he's a business man. He knows how to navigate situations that aren't exactly straight (Obama's lack of that was his the main cause of his inability). As a business man he'd probably be more willing to make deals. Unlike other politicians, he has less if an agenda, and [i]may[/i] be more willing to strike a deal, a compromise.
Trump is a master at manipulating the media and the race, he's put the whole thing in his pocket.
And the thing is im not even a republican, or invested in this race. This is all really basic shit that everyone is too stupid to see. Like literally try putting a second of thought into something before judging it. That second is all it takes to see all this shit.
Bernie Sanders is doing a similar thing, trying to appeal to the youth of our country. However his ideas were too extreme to pass in congress, and after his last disastrous comments he had no chance.
Just food for thought.
[spoiler]Clinton will win.[/spoiler]
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Mastermind? Not so much. However, the man knows how to appeal to the masses, specifically white trash. His speeches are all repetitive of how great our country is which makes people go wild for whatever reason.