This lecture outlines the foundational principles of federalism in the United States, explaining the division of power between the federal government and individual states. It defines federalism by contrasting it with unitary and confederate systems, then details how the U.S. Constitution establishes this structure through enumerated powers for the federal government and reserved powers for the states via the Tenth Amendment. The lecture also highlights crucial constitutional clauses like the Necessary and Proper Clause, the Supremacy Clause, and the Commerce Clause, discussing their impact on the balance of power and examining their interpretation through landmark Supreme Court cases such as McCulloch v. Maryland, Gibbons v. Ogden, and United States v. Lopez, showcasing the evolving nature of federal authority.

Federalism as a Core Principle: The lecture emphasizes that federalism is not merely a theoretical concept but is "at the very core of the United States constitutional system." It represents a "sophisticated division of powers" between the national government and the individual states, designed to achieve a "balance between national unity and the preservation of state autonomy." This system contrasts with unitary systems (centralized power) and confederations (states retaining dominant sovereignty).

Constitutional Basis for Federalism: The document outlines the specific constitutional provisions that establish and delineate federalism:

Enumerated Powers (Article One, Section Eight): The Constitution lists specific powers granted to the federal government, such as regulating interstate commerce, coining money, declaring war, and raising armies. These are presented as a "carefully selected set of responsibilities deemed essential for the national government to effectively function."

Implied Powers (Necessary and Proper Clause, Article One, Section Eight): This clause grants Congress the power to enact laws "necessary and proper" for carrying out its enumerated powers. It is described as a "vital source of flexibility," allowing the federal government to adapt and effectively exercise its responsibilities.

Reserved Powers (Tenth Amendment): This amendment states that "the powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people." This reinforces the principle of limited federal power and affirms the states' broad authority over matters not specifically assigned to the national government, including "health, safety, welfare, and morals" (police powers).

Supremacy Clause (Article Six, Clause Two): This clause establishes the hierarchy of law, declaring the Constitution, federal laws, and treaties as the "supreme Law of the Land." It ensures that "federal law will prevail" in cases of direct conflict with state law and prevents states from undermining valid federal laws.

The Significance of the Commerce Clause: The Commerce Clause (Article One, Section Eight, Clause Three), granting Congress the power "to regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes," is highlighted as a "most significant and frequently litigated sources of federal authority." Its interpretation has "profoundly influenced the balance of power between the federal government and the states," reflecting "evolving societal needs and philosophical perspectives."

Landmark Supreme Court Cases and their Impact: The lecture reviews key cases illustrating the evolution of federalism and the interpretation of federal power:

Federalism, Division of Powers, Constitutional Law, Supreme Court, State Sovereignty, Commerce Clause, Judicial Review, Implied Powers, Sovereign Immunity, Civil Rights