In the Tea Party surge in 2012, Richard Mourdock upset long time Indiana senator Richard Lugar in the Republican primary. Lugar had served admirably in a long and distinguished career, but Mourdock won over voters with promises to
"shake up Washington as an outsider"
"take on the Republican establishment"
Mourdock won the primary and then got DESTROYED in the general election by Democratic moderate Joe Donnelly. (Donnelly won handily in a race that was supposed to be a slam dunk for the Republicans)
It was Mourdock's mouth that got him into trouble, as he failed miserably in debates, and, most disastrously, at one point implied that rape could be intended by God.
Guess what, Republicans in Indiana learned a hard lesson, but they won't nominate someone like Mourdock for a long, long time. They learned that electability ACTUALLY MATTERS, and that you can't put someone up for general election just because they promise to go burn the establishment down. Any crazy person can promise to go burn everything down.
And I think the same thing will happen with Donald Trump.
1) He's promised to burn down the establishment (Democrats and Republicans)
2) He says completely asinine statements that defy reality
3) He will be destroyed in a general election
4) Nationally, Republicans will learn the hard lesson that electability actually matters
After Trump is destroyed in the general election, a lot of Trump supporters will go back to not voting and will disappear from politics, and the rest of the Republicans drinking the Trump Koolaid at the moment will sober up, do their penance for getting behind a mad man, and will all make promises to never do anything like nominating Trump ever again.