They won't change their minds. They will go down with Trump and hope they don't lose the House and Senate with him.
No. There's a shift going on out there. Trump's "statement" yesterday did nothing to quell the anger.
Right now, all the elected officials and the RNC have maximum leverage over Trump. They should force him to do something he's never done: apologize to the judge and to the American people for his racist remarks.
If he doesn't, let him know that they are dropping their endorsements and will find a way to deny him the nomination. And they can do it, if they have the will.