I wonder if Trump's continuing (seemingly almost daily) reckless behavior will cause a host of Pub officials to retract their current pro forma endorsements of Trump. The risk is now greater that Trump is going to take down a bunch of Pubs down ballot. I don't expect politicians in general to just do the right thing, but they do have a survival instinct, which survival may now well be imperiled. And frankly if the Pubs take a lashing at the polls, up and down the ballot, all I can say at this point is that it is richly deserved. The Pub party has failed the nation, and deserves to be punished. Yeah, I'm pissed!
Most Republicans are more vulnerable in primaries than in general elections so as long as the GOP base sticks with Trump they will too.
I don't follow your point Gustaf about primaries. In any event, a chunk of the Pub base is not sticking with Trump. The issue is how many of them will not vote down ballot, or decide to send the Pub party a message that its current incarnation is simply unacceptable.