> Post (as federal institution) has constitutional protection from local states, all sorts of thugs, and people who would interfere with mail delivery. > > Tha

> Post (as federal institution) has constitutional protection from local states, all sorts of thugs, and people who would interfere with mail delivery. > > That clause handles what local states must do, it is not about federal goverment! That clause does indeed empower the federal government to statutorily legislate the types of protections you describe, but those protections do not directly spring from the text of the constitution without enabling federal statutory legislation - as do for example the restrictions on the states from the Bill of Rights as incorporated against the states by the 14th Amendment.