I'm very curious about the effect of "not endorsing Trump in public since it's not accepted". I bet plenty will vote differently than what they voice now.
I'm not sure if anybody ever actually talked to actual people about why they vote Donald. I believe it would be much, much better then mocking them at any given occasion and one could be up for a surprise.
This is the only article I read where they actually asked people why they vote Donald.
https://www.theguardian.com/us-news/...ters-speak-out
it's a longer read but well worth it. Note these "secret voters" are far from the well medialized stereotype and I trust the general election numbers now would be much, much closer than what the polls show.