"This analysis provides clear evidence that those who view Trump favorably are disproportionately living in racially and culturally isolated zip codes and commuting zones. Holding other factors constant, support for Trump is highly elevated in areas with few college graduates, far from the Mexican border, and in neighborhoods that stand out within the commuting zone for being white, segregated enclaves, with little exposure to blacks, Asians, and Hispanics." —Jonathan Rothwell, Gallup Researcher

In other words, race is important. Rothwell, discussing what is known to social scientists as “contact theory,” essentially argues that living in overwhelmingly white enclaves increases one’s chances of being a racist, as “Limited interactions with racial and ethnic minorities, immigrants, and college graduates may contribute to prejudicial stereotypes, political and cultural misunderstandings, and a general fear of rejection and not belonging.” —Ryan Lizza