If your liberal dad is like my liberal dad, politely refuse to engage in the conversation. When the subject of Trump comes up in my father’s house, he and his wife (my step-mother) become enraged at the slightest argument that Trump is not the reincarnation of Hitler. I used to argue with them. Now I just tell them to stop watching MSNBC and that getting this angry is not good for their health.
#TDS is real and had many adverse real world consequences.