and a million Trump supporters may bail on the Republican party shortly after that.
A million would be on the small side. If they come out of the Convention with anyone other than the front runner as the nominee, every single bit of oxygen will be sucked out of the Republican Party immediately. You would never hear or see another thing about whoever the candidate would be. All Hillary would have to do is stay out of jail and they would name her president by 7:30 on Election Night.