I actually know a couple Trump supporters. The reasoning comes from a few things. It seems the biggest one is “he says what everyone else is thinking.” I guess they find it refreshing that he’s not afraid to say racist stuff about Mexicans and Arabs, sexist stuff about various women, etc. Even if other candidates might agree with those ideas, they’re finding more PC ways of saying it, and some people are sick of that stuff. Hell, in their view, it’s not racist if it’s true.
Second, they’re sick of the establishment. Look at McCain, but even more notably Romney. Not only were both plain vanilla establishment, but they were losers who didn’t represent the country as it really is. These are people who believe that the country is actually far more conservative than it really is, and it’s the establishment and the liberal media that’s keeping real conservatism from winning out. Hell, in 2012, the Republicans tried twelve different shades of conservatives before they HAD to settle on Romney, despite him being a RINO, because he was the most electable. They didn’t like him, but they had no choice. And the thing is, the more Trump is attacked, the more it galvanizes his support because he just reinforces that the establishment is afraid of him.
Third, he doesn’t NEED the big corporations to get elected. All the major candidates are getting watered down by the liberal media and some liberal big corporations and donors because they need their money to run their campaign. Trump has all the money he needs on his own. Of course, they don’t see that this means that he’s not really beholden to anyone other than himself, but whatever.
Personally, I don’t agree with them. I don’t even think he actually wants to be president. I seriously think he’s just pulling the ultimate epic troll, and now that he’s gotten some traction, it’s fed his ego and he’s just seeing how far he can go with it. It’s not unlike pulling a small prank on a friend, but he buys it really hard, so you just keep pushing the ridiculousness of the scenario until to see just how far it can go before he finally realizes he was pranked.
I think this whole thing started with the Birther thing and, as I recall, Trump started off pretty tame with it, realized he was getting some attention from it, and then he starts getting lawyers involved trying to get documents revealed and suing people over it and all kinds of stuff. I think he thrives, not just on the attention, but actually just messing with people. After all, I think that with billions, there still comes a point where buying more crap just isn’t interesting any more. Many of the insanely wealthy end up spending that on charity or crazy pipe-dream investments. I think Trump is doing a social experiment of the ultimate real-life troll. And the best thing is, he’s so wealthy and influential, it really doesn’t matter to him who is president anyway, so he’ll stick to it until it stops being entertaining to him.
So, with that, going back to the OP, the best thing the Republicans can do with him is to STOP attacking him, and stop giving him attention. Don’t ask him about controversial stuff like racism and sexism or his money. Instead, just ask him policy stuff and highlight his incompetence. He’s a bully, and bullies thrive even on negative attention, in the sense of being seen as a bad guy, but bullies bully because they have insecurities. If those insecurities are highlighted, they’ll quickly give up.
The thing is, though, Trump is the best thing ever for the Democrats. If Hillary, or any other Democrat, is smart, if they notice that he starts dropping in the polls, they’ll figure out a way to reinstigate him. If they CAN keep him going long enough, particularly if he runs third party, that’s a huge bonus, and they can pretty much waltz into the Whitehouse.