We all have friends who vote Democrat and have a Bernie Sanders sticker on their car, maybe if not a friend than a family member, and you should talk to them. They will usually come around on their own to conservatism but speed that up by questioning them on why they think the way they think. Why? And How? Are questions that make them think and when people start thinking they escape the false Democrat narrative. You don't need to win them over, truth does that for you.