NO, you forget that the laws don’t apply to liberals. Just like free speech does not apply to us. In fact this case puts both of these concepts together. As someone else stated he really should have been promoted.
I doubt that politics had much to do with this. Prosecution is a function of its cost and what the employee was caught doing. Forcing a resignation is pretty standard.
Alcohol and other substance abuse is usually involved when a postal carrier is caught ditching mail. This is probably not the first time for him, it’s just how he got caught. Political mail is more closely tracked both within the postal service and by outside observers. One article says he’s 51 years old so he is likely a veteran employee and he just threw away his retirement when he was forced to resign. Tough for his family if he has one.