From a text exchange tonight with a non-crazy Republican friend who was bemoaning Trump's popularity, my response:
The rest of the Republicans are kooks, and yet Republicans have to vote for someone.
The party is imploding, a long slow car crash.
They only have Congress due to gerrymandering.
Trump's popularity in the GOP is not really surprising, just look at their last two picks, Romney and McCain. Two guys who were actually more moderate at one point in time. Like Trump. But were forced (?) to say crazy things to become the nominee. Presumably like Trump. We'll learn the truth one day on a Howard Stern (confessional) show.
As I said, this party is imploding.
More/less half the people in it declare themselves to be "independent" (code for embarrassed Republican) or want to vote for a foreigner like Merkel.
Good luck winning the White House with that!