You act like there's a way to get a republican to not vote republican. Hell, I don't even know if there's a way to get most democrats to not vote democrat. People don't like having to think about a choice they already made. They've got their favorite political sports team, and they'll wear those colors until they die.
Even my father in law, who is one of the most politically left people I know in real life, and has a degree in political science, thinks that anything more left than Obama is too far left. I've been trying to get him to admit that Bernie would be a better president than Obama for over 8 years now. If I can't even change his mind, what chance to I have to change the minds of people who honestly think Trump is a viable choice?