@aj @Johncdvorak not to get too pedantic, but it's the internet, the USPS is not mandated, but post offices and roads seemingly are. See the Cato article that suggests it can be better privatized. Ron Paul had mentioned this in the past with allowing for competition with first class mail: https://www.cato.org/blog/us-postal-service-constitution
But good discussion, I learned more than I ever wanted to about mail and the fact the post office and roads are in fact mandated.