State Law versus Federal- Which rules?

[THE SUPREMACY CLAUSE Article. VI. This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any thing in the Constitution or Laws of any State to the Contrary notwithstanding.]

According to FindLaw, State courts are bound then to give effect to federal law when it is applicable and to disregard state law when there is a conflict; federal law includes, of course, not only the Constitution and congressional enactments and treaties but as well the interpretations of their meanings by the United States Supreme Court. While States need not specially create courts competent to hear federal claims or necessarily to give courts authority specially, it violates the supremacy clause for a state court to refuse to hear a category of federal claims when the court entertains state law actions of a similar nature.

According to LectLaw, Under the Supremacy Clause, everyone must follow federal law in the face of conflicting state law. It has long been established that "a state statute is void to the extent that it actually conflicts with a valid federal statute" and that a conflict will be found either where compliance with both federal and state law is impossible or where the state law stands as an obstacle to the accomplishment and execution of the full purposes and objectives of Congress. Edgar v. Mite Corp., 457 U.S. 624, 631 (1982). Similarly, we have held that "otherwise valid state laws or court orders cannot stand in the way of a federal court's remedial scheme if the action is essential to enforce the scheme."

Where Congress is silent, however, the Court must itself decide whether the effect of the federal legislation is to oust state jurisdiction.