No, worst case it provides some trumped up grounds for pressuring the USPS into insisting on uneconomical terms and denying Amazon service, thereby simultaneous

No, worst case it provides some trumped up grounds for pressuring the USPS into insisting on uneconomical terms and denying Amazon service, thereby simultaneously driving the USPS even further into the red and screwing over Amazon investors & customers (ie almost all Americans), all to gratify Trump's vendetta against the WaPo.