One, I've stopped posting political posts myself. The elections over, we won, and I'm not going to change the minds of my rabidly liberal relatives by Facebook anyway. This election was proof of that.
Two, since I'm not posting political posts, no one else gets to have them on my timeline either. I have a few stuck-on-stupid relatives who are still posting a steady stream of anti-Trump crap. I unfollowed them ( not un-friended them) so I don't see ANYTHING they post. I'll check back every few days to see if they're un-stuck on stupid, and if they ever reform I might follow them again, but at least I don't have to put up with it if I don't want to.
Three, I've created an alternate Friends list that includes all my friends that are reasonable, and excludes the ones that aren't. I can post what I want and share it with people that share my values, while not cutting off all ties to family, which in my experience, can cause bitterness for generations.