“My daughter just turned 18 and registered as a Democrat.”
There is a cure for this idiocy. Tell her that she is henceforth working her way through college.
Being a jerk isn't going to win hearts and minds. My oldest daughter was even more liberal than her mother when she was college aged. The cure was a family of her own. Had I been a complete dick about political disagreements, knowing her personality, she would have stubbornly clung to those liberal beliefs.