Do we have British Common Law, or American constitutional law?
For civil courts, we are under British civil laws. Attorneys take the BAR, and an oath to the BAR: British Accreditation Registry. I’m fairly sure that the ABA falls under the BAR. This is basically a guild, as in the old European style.
Not sure what is “American Constitutional law”? Sounds like Common Law, based on the Bible, Declaration, Constitution, first 12 amendments. Practiced in SCOTUS.
Not sure we have ANY law at this point.