What explains the diploma divide?

Voters with college degrees are increasingly supporting Democrats, with Republicans now doing better among those without college—a big reversal in recent decades. Joshua Zingher finds that college-educated Americans are more liberal on social issues and that more educated Americans are moving furthest toward Democrats when surrounded by other educated people. White voters are flipping fastest by education but the trends are present across the electorate. Will Marble finds that white college graduates are now more liberal across economic, social, racial, and foreign policy issues. Less educated white voters have increased the importance they place on non-economic issues, polarizing the electorate on these issues.