Writing at The Hill, Niall Stanage poses this question: Can Trump unify the GOP? His short answer - based on the public statements of various party officials - is no.
I agree, but maintain the question is largely irrelevant, under current conditions. Trump won't have to unify anything, Hillary Clinton will unify the GOP. She is almost as widely disliked and distrusted as Obama.
Party officials understand the "lesser of two evils" concept. They may not campaign for Trump but they will hold their collective noses and vote for him.
If Clinton is not the Dems' nominee - if she is indicted - I'll need to reevaluate. Sanders would get some votes she would not, people wanting a left-leaning outsider.