I'm a moderate, but not a republican. Using my parents, who I suspect are in the 'establishment republican' mold as an example though:
Both B.S. graduates from reputable public universities, stable jobs, no criminal background, white, mainline protestant, a few years from retirement, est. house income 125-175K.
Father has made no endorsing statements so far. Not a peep.
But my mother demonstrates visceral repulsion at the mention of Donald. She voted Bush 04, Obama 08, Romney 12.
We all live in the FL I-4 Corridor. When senator Sherrod Brown talked about moderate suburban Ohio voters deciding election (sorry couldn't find link) he was speaking about people like my parents.
I'm certain Donald trumps presence on the ticket guarantees to flip my mothers vote. And a chance for my dad as well. These are people who are %75 Rep normally.
Especially in a swing state, tough votes to be loosing.
Replace "mainline protestant" with Catholic and that almost perfectly describes my parents. They are the moderate suburban Ohio voters Sherrod Brown was talking about. They are not the type of people who normally talk a lot about politics but have been completely against Trump from day one.