My mother passed away before Trump became president, but she was saying things that make me think she would have supported him.
I loved her and she loved me. My strategy was always to say over-the-top stuff, including strongly implying that I would be willing to commit acts of political violence, so that she would sense that talking about politics too much would cause a fight that she wanted to avoid.
If all you talked about was executing Trump for his crimes in increasingly fanciful ways, would they argue with you or would they try to avoid conflict? Don’t try to change their mind, but put the in the awkward spot of having to react to you instead of you reacting to them. Keep it as policy-free as possible so they won’t be tempted to think they can change your mind with “facts”.
See also this thread: