Yes. Article I, Section 8 lists "To establish Post Offices and post Roads;" as one of the 18 "enumerated powers" of the Congress.
Congress
The ruling of Congress in regards to the United States postal service closing an extra day a week has been released. It was ruled that the postal service must continue delivering mail 6 days a week.
Congress has control over the post office. In the Constitution, power is given to Congress to establish a postal service.
The Espionage Act gave postal service official authority to ban newspapers and magazines from the mail.
speed postal service
United States Postal Service
Indian Postal Service was created in 1764.
United States Postal Service and UPS
Postal service
How do you become a contractor for the US postal service?
The United States Postal Service is abbreviated USPS.
United States Postal Service (USPS), FedEx, and UPS are all postal service companies that provide tracking number abilities because the are all delivery service businesses.