The Associated Press reported Saturday afternoon, in the wake of a pair of tweets from President Donald Trump earlier in the day asserting, among other things, that the U.S. Postal Service loses an average of $1.50 per delivery executed for e-commerce giant Amazon.com AMZN, +1.11% , that the president is incorrect in that claim. While the post office has lost money on an annual basis for more than a decade, according to the AP, package delivery is not the reason. In fact, according to the AP, Amazon and e-commerce in general have helped the post office achieve double-digit percentage gains in parcel-delivery revenue. Pension and health-care costs and declines in first-class and marketing mail business are more fairly to be blamed for the post office's overall business performance. Federal regulators, the AP noted, have determined the post office's servicing of Amazon to be profitable to the post office.