The problem with moonbat relatives is that for every misconception they have that you explain correctly with facts, they have a thousand other ones that they and their kook friends will cling to.
Confront them enough, and they’ll just stop talking with you about politics, or talking to you altogether (either may be a good thing).
Unfortunately, they still get to vote.
Or they are just unable to understand simple concepts like my D-I-L who is pro-choice...I actually had to point out to her that if you get pregnant, the end result is that you are going to have a baby. The kicker is that she is a degreed biologist that works with DNA on a daily basis, LOL!