Also Democrats tend to have a higher proportion of post-high school degrees. While that’s not a guarantee of being smart (I went to college with some DUMB people who managed to graduate–all happened to be business degree students with a right-leaning bias, fwiw) it does suggest a higher concentration of people who’ve engaged with critical thinking.
Studies have consistently shown the further right wing you are the dumber you are on average.
Also in my experience right wing people tend to lack a sense of irony and are more fearful.
Also:
https://en.wikipedia.org/wiki/The_Republican_Brain
Also Democrats tend to have a higher proportion of post-high school degrees. While that’s not a guarantee of being smart (I went to college with some DUMB people who managed to graduate–all happened to be business degree students with a right-leaning bias, fwiw) it does suggest a higher concentration of people who’ve engaged with critical thinking.