From a story on politico.com by Kai Elwood-Dieu, Jessica Piper, and Beatrice Jin headlined “The educational divide that helps explain the midterms”:

Control of the House is still up for grabs several days after Election Day — defying historical trends and the pressure of high inflation and President Joe Biden’s unpopularity that threatened the Democratic majority with big losses.

Republicans’ difficulty flipping key swing districts across the country can be explained in part by American politics’ increasing polarization along educational lines, as well as the party’s failure to make inroads in districts populated by groups other than non-college-educated white voters.