AZBlueMeanie at B4AZ nails it.
Trump claims the outsidership and thus plays to the ani-gummint rage in the Republican ranks. Quoting from Christofer Ingraham in the Washington Post:
... observers [are] scratching their heads and asking: what do people see in the guy?
A lot, as it turns out. On a recent trip to rural Upstate New York I was surprised by the intensity of support for Trump among friends and family members I talked to. In many cases, their support for Trump boiled down to a simple fact: they were angry.
Wishing "The Donald" away will not make it happen. The conservative media entertainment complex which dishes out a daily dose of fear, anger and hatred for "the others" while simultaneously engendering a sense of victimization (and solidarity) among the haters for holding their views has created a natural constituency for a media-savvy demagogue like "The Donald."