Trump is the logical outgrowth of the conservatives' nurturing of the angry mob that now carries the label "Republican" - an observation from Kevin Drum at motherjones.com. Here are snippets (but the short article is worth your read).
... For years [conservatives have] supported the worst know-nothing bombast of Drudge and Limbaugh, the casual reality distortion of Fox News, and the resentment-based appeals of people like Newt Gingrich and Sarah Palin. And they've turned a blind eye to even worse: birthers, Agenda 21 lunacy, Cliven Bundy's army, and much, much more. It was handy at the time, and helped win a few elections. But now the outrage-based mob they've nurtured has come back to haunt them—and unsurprisingly, it turns out not to care all that much about the debating-hall nuances of Edmund Burke and Russell Kirk. They just want to kick out the wetbacks and get back at those smug liberals who make fun of them.
Live by the sword, die by the sword. But if you want to survive, you'd better at least understand that once forged, a sword can be wielded by anyone strong enough to grab it. You might not like it when your army decides to follow, but you're the one who taught them to follow the shiny object without worrying too much about whose hand is on the hilt, aren't you?