Recognize a comma splice when you see one. A comma splice, also called a run-on, occurs when a writer has connected two main clauses with a comma alone. A main clause makes a complete thought, so you should not find a wimpy comma struggling to join two such powerful clauses. The problem looks like this: Main Clause + , + Main Clause.
In the United States, the term treaty is used in a more restricted legal sense than in international law. U.S. law distinguishes what it calls treaties from congressional-executive agreements and sole-executive agreements.
Article VI of the Constitution provides that the Constitution, laws, and treaties of the U.S. are the supreme law of the land. This article is known as the supremacy clause. This means that when there is a direct conflict between a federal law and a state law, the state law is rendered invalid. Because some powers are concurrent