Final answer:
The McCulloch case focused on the 'necessary and proper clause' of the U.S. Constitution, located in Article I, Section 8, and affirmed the supremacy of federal law in Article VI.
Step-by-step explanation:
The resolution of the McCulloch case, McCulloch v. Maryland, centered on the interpretation of the necessary and proper clause found within the U.S. Constitution. This clause is specifically located in Article I, Section 8 of the Constitution. The case addressed the federal government's authority to establish a national bank and whether a state could tax that federal entity. The Supreme Court ruled that Congress had the power to create a national bank under the necessary and proper clause and that states could not tax a national institution, reinforcing the supremacy of federal law over state law as established in Article VI, the Supremacy Article.