The Constitution of the United States of America declares a treaty is the highest law of the land. The vote was 85 to 1. The Senate ratified it. It is on the State Department’s website.
In 1928 under the Kellogg-Briand Pact over 60 nations outlawed war. In this interview, David Swanson discusses his book about the 1928 Kellogg-Briand Pact and how it makes current wars illegal . Article VI, Clause 2 of the United States Constitution, known as the Supremacy Clause, establishes the U.S. Constitution, U.S. Treaties, and Federal Statutes as “the supreme law of the land.”