Ratified 1788 · Four sections governing how states treat each other
"Full Faith and Credit shall be given in each State to the public Acts, Records, and judicial Proceedings of every other State" — the clause that makes a judgment or marriage valid in one state generally valid in all others.
Gives Congress the power to admit new states and to make rules governing federal territory and property — the basis for federal control of public lands.
Guarantees every state "a Republican Form of Government" and federal protection against invasion and, on application of the state legislature, domestic violence.