Support for Donald Trump is linked to darker personality traits, including increased psychopathy and decreased empathy, new research finds. The study also connects conservative political beliefs to lower benevolence, suggesting personality may shape how people engage with politics and ideology.
Look at John Fetterman. He had a stroke, now he’s conservative, callous, etc. so, I’d bet it’s both nature and nurture, but the uneducated and religious are more likely to be conservative than liberal.