While I’ve been tromping around in Ireland, I see that this chart from Thomas Edsall has been making the rounds:

…

Edsall comments on this and other recent poll results:

What happened in the interim? The answer is obvious: the advent of Donald Trump….Michael Barber and Jeremy C. Pope, political scientists at Brigham Young University, reported in their recent paper “Does Party Trump Ideology? Disentangling Party and Ideology in America,” that many Republican voters are malleable to the point of innocence.

….Nathaniel Persily, a professor of law and political science at Stanford, described his surprise at the docility of Republican officials in an email: “While I and others had written extensively about the partisan tribalism of both elites and the mass public, I guess I would have expected greater defections by Republicans in the wake of Charlottesville.”