Princeton University sociologist Robert Wuuthnow spent 8 years interviewing folks in rural America to find out why they are so angry with Washington and the world. Sadly, it turns out the biggest reason is they are bummer the world has moved on and they don't like it.
https://www.vox.com/2018/3/13/17053886/trump-rural-america-populism-racial-resentment
https://www.vox.com/2018/3/13/17053886/trump-rural-america-populism-racial-resentment