There is a theme building on the talk shows, left and right, which is that an explanation for the popularity of Trump and the extremism we are seeing from him and others resonating, is that the GOP has been beating this drum of anger and frustration for so long now that they have to deliver. That is, the level of antagonism promoted by the GOP against DC in general is biting the establishment in the azz. No moderate can satisfy the hunger they've created for dramatic change. So when trump declines to explain anything he means, but just pounds his fist and says the system sucks and he'll fix it, don't worry, it works.