C. The Tenth Amendment and the Reserved Powers
1. The Tenth Amendment reads: The powers not delegated to the United States by the Constitution,
nor prohibited by the States, are reserved to the States respectively, or to the people.
2. Because the states hold the residual of power (i.e., all powers that are not expressly delegated to
the federal government and that the states are not forbidden to exercise), the powers retained by
the states depend on the interpretation of the powers that have been delegated. The Supreme
Court’s expansive commerce clause jurisprudence during the New Deal era altered the federal/
state balance of power. Beginning in the mid-1990s, the Supreme Court issued a series of decisions
calculated to check further expansion of federal power at the expense of state sovereignty.
United States v. Lopez (Part II). Lopez is an excellent teaching case for two reasons. First, it
contains a clear and understandable discussion of the reach of federal power under the
C. Power of the Federal Government to Regulate Activities of the States
1. While the federal government has vast regulatory power, its powers are mainly over the American
people, not the states. Principles of federalism prohibit the federal government from using its
Article I powers to regulate the actions of state governments in ways that infringe on their
sovereignty. The federal government, for example, may not use its Article I powers to force state
governments to enact particular laws, administer federal programs, enforce federal statutes, or
compensate private individuals for violating their rights under federal statutes enacted under the
commerce clause.
Printz v. United States (Part II). The Supreme Court invalidated a provision of the Brady
Handgun Violence Prevention Act requiring the chief law enforcement officer of each local
D. The Supremacy of Federal Law.
1. Supremacy Clause declares that the Constitution and laws of the United States made in pursuance