Trump represents change, sure... but that does not mean it's positive change. For instance, if I were sitting around really bored with my life one day and decided to burn down my house... I'd be homeless AND lose a great revenue stream (it's a two-family home, I rent the upstairs on AirBnB.)

You mention trump is a "successful businessman" but perhaps you aren't getting all the details here. He's had four bankruptcies, and at each one his business partners forced him out of any leadership role in those companies. He's gone on stage and talked about half a dozen businesses that fact checkers later found he did not own or had gone out of business.

You have heard correctly that many people stick with their own party, although new voters tend to stick with their parents' parties. That said, we're actually seeing some Republican leadership denounce Trump as well as voters.

Before you claim it's because he's "anti-establishment" we've actually had anti-establishment businessmen run before. Back in the early '90s when I was a kid Ross Perot ran as a third party candidate, and was in fact incredibly popular. among Democrats, Republicans AND independents! He probably would have one, except he bowed out of the race.