I disagree. Most of the republicans who vote will vote for the republican nominee just because they are the republican. That is how we get the McConnells and Corkers.
Then there are the cross-over voters Trump will get. I think he will get Reagan democrats as well as many minority votes because of is stand against illegal immigration and the economy.
Add to that, a lot of democrats will stay home because they are not excited about Hillary.
So you believe establishment type Republicans that want to kick Trump out of the party would then vote for him? Yeah right.