That's not why the postal service is federal though. Establishing a postal system is a power given to congress in the U.S. Constitution. "To establish Post Offices and post Roads;" Actually having a postal system run by the government was something that predates the U.S. constitution.
That's not why the postal service is federal though. Establishing a postal system is a power given to congress in the U.S. Constitution. "To establish Post Offices and post Roads;" Actually having a postal system run by the government was something that predates the U.S. constitution.