Of course!
The problem is, if they do this, they risk alienating a huge number of voters for a long time. Yes, some of those voters are unsavory but they would be unwise to alienate all of them.
Doesn't the fact that a solid majority of Republican voters, per polls, are still sticking by Trump kind of give lie to this notion that your party was hijacked by a small band of interlopers?
If a majority of Republican voters are sticking by Trump after all of this, then, guess what, it is Trump's party now. You're just choosing to stick around.
Of course not. The fact that a solid majority are voting against Hillary Clinton just goes to show what kind of a person Hillary Clinton is. Trump received a plurality, not even a large one, in the primary, and even now a pretty decently-sized majority of his supporters describe themselves as "against Hillary" rather than "for Trump". That's a ridiculous argument.