Federalism: Federalism is a political system where power is divided between a central governing authority (the federal government) and individual regional governments (states).
Reserved Powers: Reserved powers are those not specifically listed in the U.S. Constitution as belonging to the federal government but are reserved for states or individuals.
Nullification Crisis: The Nullification Crisis was a historical event in the early 1830s when South Carolina attempted to declare a federal tariff null and void within its borders, challenging federal authority.