The USPS often is mischaracterized as a quasi governmental or private entity. It is neither. The USPS is a government agency that was created by Congress to achieve various public purposes. Federal law defines what products and services the Postal Service may offer.
Sedition and seditious libel were criminal offences under English common law, and are still criminal offences in Canada.
SEDITION. se-dish'-un: The translation in Ezra 4:15,19 for 'eshtaddur, struggling, revolt; in 2 Esdras 15:16 for inconstabilitio, instability with be seditious for stasiazo, rise in rebellion in 2 Macc 14:6.