It's more likely to be related to culture and political structure than education is my guess. Unless, maybe, we want to use a different definition for education than just degree attainment. For example, Finland has lower attainment rates for bachelor degree equivalents than the US. This would seem to disprove your point.
The real issue is the two party split and urbanized distribution. The way the voting works and the structure of the houses means that once you reach about 85% urbanization the rural areas won't matter. We can see this at many state levels that mimic national political structure. We have multiple nations within our county, with the biggest divide probably being between urban and rural. So all you have you have to do is promise the rural group who feels they are increasingly marginalized a candidate who will look out for their interest. The specifics of those promises don't really matter because in the 2 party system it's us vs them more than actual policy positions. You will find a much bigger difference looking at the urbanization based metrics than you will at the roughly 10pt difference in who people with bachelor degrees voted for.
Edit: why disagree?
My only issue with your comment is it seems to blame a two-party system. It is my understanding/belief though that a two-party system is just inevitable in the U.S. When a 3rd party has risen it acts only as a spoiler to the party it is most aligned with.
Don't know why the disagree, but this is a real problem and plagues the House of Representatives which then allows actually incompetent but loud candidates like Greene and Boebert to vote on important and serious legislation.
> It's more likely to be related to culture and political structure than education is my guess. Unless, maybe, we want to use a different definition for education than just degree attainment. For example, Finland has lower attainment rates for bachelor degree equivalents than the US. This would seem to disprove your point.
The university educated are the top. Politics is not about the top few percent, it's about the masses. At this the US education system is really bad, especially in poorer areas.
> For example, Finland has lower attainment rates for bachelor degree equivalents than the US. This would seem to disprove your point.
In Finland, most university students go for a master's degree. A bachelor's degree is often seen as sort-of a safety valve, if it turns out you didn't have what it takes to complete the full master's degree. So you get at least some sort of degree from having been to university rather than just having your high school diploma as your highest official educational achievement.