Final answer:
The Supremacy Clause in the US Constitution clarifies federalism by establishing the Constitution and federal laws as the highest authority, ensuring that federal laws supersede conflicting state laws and maintaining a unified legal system.
Step-by-step explanation:
The Supremacy Clause clarifies federalism in the US by establishing the Constitution and federal laws as the ultimate authority, thus resolving conflicts between federal and state laws in favor of the national government. It is a fundamental principle within the constitutional framework that ensures a unified legal system. Through landmark cases like McCulloch v. Maryland, the Supreme Court reinforced this principle, demonstrating that federal policies prevail over state legislation that conflicts with constitutional mandates.
This clause is integral to understanding the balance of power between state and national governments in the US federal system. Furthermore, it illustrates the limited yet supreme authority the national government holds within its constitutional purview, creating a hierarchy of laws that must be followed across the entire country.