Personally, I'd cut them off as I'm diametrically opposed to fascism and bigotry. But I get that family relationships can be complicated, and if people are dependent on those Trump supporters cutting them off really isn't a viable option. The reality is we're all more isolated than ever, and without some kind of support system, cutting off the few people some have connections with might end up doing more harm than good. We need stronger communities built around opposing the coming tidal wave of crushing hatred - much easier said than done.