The Court ruled that it was under Article III, Article VI, and the spirit of the Constitution. Article III grants the Court jurisdiction to all cases arising under the constitution, laws, and treaties of the United States. Article VI anticipates that cases involving the constitution, federal law, and treaties would arise in state court. In these cases, state judges are bound by the constitution and federal law as the “supreme law of the land.” Under the combination of these two articles, appellate power extends to state court cases involving federal law, and federal interpretations supersede state interpretations. This promotes uniformity of decision throughout the nation.