The way this article discusses the working white poor as a foreign species is a little offputting, but there's enough here that it's worth reading anyway.
The deeper problem was the perception of the white segment of the lower-middle class that their problems were invisible. They heard talk about African-Americans or Hispanics and the need to integrate them into society. However, from the white lower-middle class perspective, there appeared to be little interest in the challenges facing their demographic. Indeed, there was a perception that the upper strata and the media not only didn’t care about them, but had contempt for their beliefs.