Places that support Donald Trump also tend to have the most franchise foods.

[Retrograde]

5. I think they're also places with fewer immigrants

At least in the more urban areas. A lot of lower-priced and more casual places around here are run by immigrants: if you're willing to work hard and put in long hours a restaurant gives you flexibility - and you can hire your relatives to help out! And when the kids finally get through college and can support you, you can retire (Happened to one of my favorite local places: watched the kids go from doing their homework in a corner of the dining room to busing tables after school to helping with serving on holidays when they were in college. A few years after the youngest graduated the parents decided to sell the building and retire.)