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 Democrats have made a huge case about inequality, assuming that the problem is that the rich own too much. American political culture has rarely been triggered by inequality, but by the inability to acquire the basics of American life. The problem with the Republicans is that they have not noticed that the defining issue of this generation is the collapse in the standard of living of the middle and lower-middle classes. This is part of what brought Trump to where he is today, but only part.

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.