That is only the beginning of the problem.....but ya....one of my kids is a Regressive Leftist.....5 years at university of Washington just as it was getting really bad was something that I failed at inoculating against....I never noticed how bad the problem was till it was too late, had I I would have done more.
It is my biggest failure.
How horrible. Your child left home and learned to think for him/herself. I'll bet they went off and learned how to make a logical argument and examine facts while putting aside their biases. (Something you clearly can't do.) That tends to make people stop being conservative. Reality has a well known liberal bias.