Sociologists' report on "Does Anger Drive Populism?" : https://www.nber.org/system/fi...rs/w31383/w31383.pdf

The paper accounts for populism on both sides of the ideological spectrum (e.g., the Bernie Bros. as well as the Trumpists).

There is even a county-by-county "map of anger" on page 12, and a careful separation of "anger" and "discontent" (i.e., just because someone is angry about something does not necessarily mean he is unhappy about his own life).

WaPo's reporting on the study: https://www.washingtonpost.com...gallup-poll-sadness/

That’s the first polling map I’ve ever seen that doesn’t clearly show the Mason Dixon line.