Anyway, not that the United States is applicable, but you can't have a successful democracy without an educated populace. One that can use logic and reason to make their society more harmonious and more prosperous. Any serious democracy would prioritize the free/heavily subsidized education of its citizens. But when you are interested in minority rule as a throwback to when "America Was Great", then you'll balk at removing financial barriers to education, ensuring that many cannot have a great education, and if you do, you'll most likely incur so great a debt that servicing it will sap your ability to profit from said education... better yet you'll convince members of an oppressed class that removing barriers is "unfair" just because they had to navigate said barriers, and removing it now is just unfair to them...
Anyway, the U.S. is fukked long term, and it couldn't happen to a more arrogant and selfish populace.