Introduction: Why Federalism Matters
Federalism — the division of power between the national government and state governments — is one of the most important themes in AP U.S. Government and Politics.
It’s tested in multiple-choice questions, FRQs, and essays. Students who understand how federalism has evolved through landmark cases, constitutional clauses, and historical shifts will score higher on the exam.
With this guide, plus RevisionDojo’s federalism diagrams and practice banks, you’ll be ready to explain, compare, and apply federalism in any AP Gov question.
Step 1: What Is Federalism?
- A system of government where power is divided between national and state governments.
- Found in the 10th Amendment (powers not given to the federal government are reserved to the states).
- Designed to balance unity with state independence.
AP Gov Tip: Federalism questions often ask whether federal or state governments gained/used more power.
Step 2: Types of Federalism
- Dual Federalism (“Layer Cake”) → Clear separation of state and federal powers (1789–1930s).
- Cooperative Federalism (“Marble Cake”) → Federal and state governments share responsibilities (New Deal onward).
- Fiscal Federalism → Federal government influences states through grants-in-aid (categorical vs block grants).
- New Federalism/Devolution → Returning power to states (Reagan, 1990s, U.S. v. Lopez).
Step 3: Constitutional Clauses That Shape Federalism
- Supremacy Clause (Article VI): Federal law > state law ().
