Oh, and your last 2 sources are contradicting. The first says the usps ran a deficit for all but 2 years since 1971, the second says they have had a billion dollar profit each of the past 5 years. Get back to me when you have a clue what you are talking about.
i quoted the second source to show that the fed ran it until 1971, i have no idea where they got the budget data
but the first source is quoteing USPS chief financial officer at that time Richard Strasser, and well he should know