Basically, the Manhattan DA has suspended the rule of law. The rule is that there's one law for everyone, from the highest to the lowest. That isn't true in the US, where a person who is thought guilty by prosecutors is protected from justice by the DA because he was president.
For me, the DA also ought to go to jail for this decision. It's the fundamantal building block of Anglo-Saxon law. The thing that Magna Carta is about. Even kings are subject to law.