Think of it this way maybe. Imagine someone who's family was straight ticket Democrat and heavily identified with Democrats their whole life. They're big on protecting the little guy and support economic government programs to do so. Much of this demographic is going to disproportionately rural, blue collar, and with lower levels of education. Maybe they're not happy with voting for Obama but because Romney is a shill for big business (as many people thought) he's not looking at protecting someone like me, nor does he speak in a direct easy way, he's just another standard politician who will do the same standard politician thing, and he'll give his rich buddies a break while not giving a sh**t about anybody else. That's the line of thinking anyway. So they vote Obama, even though they would probably skew socially conservative and authoritarian. But then Trump runs, and the rest can be filled in from here. Everything that was wrong with Romney isn't wrong with Trump. Someone that speaks to them directly and connects with them, someone who isn't bought and paid for, etc. A lot of that in fact can be turned around on Clinton so easily.
These voters are going to be your anti-establishment moderate voters, not the bigots or the people super enthusiastic about banning all Muslims or deporting all illegal immigrants.
This is a good description of me.
I have been a registered Republican since 1995, but I'm very much a RINO. I fit the mold of a moderate Democrat more than a conservative Republican.
People have an amazing amount of trouble believing that such people exist, but they do. Trump is, politically, a rather moderate Republican, at least in issue positions he takes.
