**UPDATE** @PeteButtigieg: "The failures of the Obama era help explain how we got Trump."

[betsuni]

48. "The administration of Barack Obama was not only eight years of a Democratic president --

in which partisan polarization continued to grow -- but also eight years of a black president. As a result, Americans' racial identities and racial attitudes became even more potent political forces and helped transform the party coalition. Non-whites increasingly identified as Democrats. Whites -- and particularly whites who did not have a college degree and had less favorable views of racial and ethnic minorities -- increasingly identified as Republicans. The party coalitions became more divided by race and ethnicity after Obama took office and before the 2016 presidential campaign was seriously under way.

"... during the Obama era, whites were leaving the Democratic Party. In Pew Research Center surveys from 2007, whites were just as likely to call themselves Democrats as they were to call themselves Republican. But by 2010, whites were 12 points more likely to be Republicans than Democrats."

From "Identity Crisis"