Not quite federal, not quite private; post offices are having trouble staying afloat these days. With services like FedEx and UPS that make shipments easier, it’s hard for the post office to stay relevant. If you’re in your twenties, odds are that you haven’t bought stamps in your lifetime.
The post office hasn’t gone under, yet, but the odds of it happening have never been higher. The problem is that crucial services, like keeping track of where people live, is done by the post office. Otherwise, there’s really no reason for the post office to still exist. Even postcards and greeting cards have gone digital, and you can send them right from your phone using a wide range of apps.