Education is incredibly strongly correlated with not voting republican.
Some college educated white voters shifted to the Democrats in 2020 so the gap was a bit wider so I wouldn’t say “incredibly” unless you think 3% is incredible..
It’s a different matter for postgraduates though (62-37% in 2020)
Obama lost the white non-college educated vote by 26 points to Romney, by the way.
I’m sorry what??
It was the complete opposite. Obama won the “high-school dropout” vote overwhelmingly. Had narrow majority amongst those who graduated and actually lost college graduate vote to Romney by 4%…
Romney also won every income bracket above 50k
Less educated people started voting for the Republicans in 2016 but not quite to the extent they voted for Obama.