My parents are Trump supporters and we vehemently disagree on pretty much everything. I try to avoid talking about anything that could start an argument, but it's nearly impossible. My mom wants to make plans for Thanksgiving and Christmas and I just don't feel like it's going to go well. Regardless of who wins the election, one of us will be upset and angry. They live out of state, so it's easy enough for me to say we aren't going to make the trip, but usually, if we don't go there, they come here (for at least one holiday). How can I politely tell them I don't want them to come this year?