Most of the ones that I see are usually white and in their early 60s.
Recently I drove Interstate 5 from Southern California to Southern Oregon and back two times. I checked Obamamobile occupants too. Yes, most of the were white and in their early 60’s. None were black, Hispanic or Asian. Those who were younger were of the tree-huggin’ type. In all cases, they wore blank expressions.
White early 60’s - yep, my experience as well.