How does the Constitution divide and share power between the national and state governments, and how do grants and mandates shape that relationship?
Topic 1.7 Relationship Between the States and Federal Government: explain how societal needs affect the constitutional allocation of power between the national and state governments.
A focused answer to AP US Government Topic 1.7: how federalism divides power through enumerated, reserved, and concurrent powers, the Tenth Amendment, and how categorical and block grants, mandates, and revenue sharing shape national-state relations.
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What this topic is asking
Topic 1.7 introduces federalism: the way the Constitution splits power between the national government and the states. The College Board wants you to know which powers belong to each level, which they share, and how the national government uses money (grants) to influence states even in areas it cannot directly control. This topic sets up the constitutional cases in Topic 1.8 and the policy examples in Topic 1.9.
How power is divided
The categories you must be able to sort:
- Enumerated/national powers: coining money, declaring war, regulating interstate and foreign commerce, raising an army.
- Reserved/state powers: running elections, education, intrastate commerce, public health and safety (police powers), marriage and family law.
- Concurrent powers: taxing, borrowing, making and enforcing laws, building roads, establishing courts.
How the national government influences the states
Because the national government cannot simply legislate in reserved areas, it uses its spending power to shape state behavior. This is the heart of Topic 1.7 for the exam.
This is sometimes called fiscal federalism: the national government uses money, not commands, to extend its reach. States feel pressure because refusing the funds is politically costly.
Why this matters for the exam
Topic 1.7 is one of the most heavily tested in Unit 1, because federalism appears in Concept Application (a grant-with-strings scenario), in the Quantitative Analysis FRQ (data on federal versus state spending), and in Argument Essays on the balance of power.
Try this
Q1. Name the amendment that reserves powers to the states. [Recall]
- Cue. The Tenth Amendment, which reserves to the states all powers not delegated to the national government.
Q2. Distinguish a categorical grant from a block grant. [Short explanation]
- Cue. A categorical grant funds a narrow purpose with strict conditions; a block grant funds a broad purpose and gives states greater discretion.
Exam-style practice questions
Practice questions written in the style of College Board exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
AP 2018 (style)3 marksThe federal government offers states funding for highway construction but requires them to adopt a minimum drinking age of 21 to receive the money. A. Identify the type of federal grant described. B. Explain how this grant allows the national government to influence state policy. C. Explain how a state might argue this intrudes on its reserved powers.Show worked answer →
A Concept Application FRQ, 3 points (A, B, C).
A. Identify: a categorical grant (funds for a specific purpose with conditions attached).
B. Explain influence: by attaching conditions to money states want, the national government pressures states to change policy without directly legislating in that area.
C. Explain the state argument: setting a drinking age is a reserved power under the Tenth Amendment, so the state could claim federal conditions coerce it into surrendering reserved authority.
Markers reward naming the grant type and tying the conflict to reserved powers and the Tenth Amendment.
AP 2021 (style)6 marksDevelop an argument about whether the constitutional division of power gives too much authority to the national government. Use at least one piece of evidence from one of the following: the Constitution of the United States or Federalist No. 51. Provide a defensible thesis, evidence and reasoning, and a response to an opposing perspective.Show worked answer →
An Argument Essay FRQ, 6-point rubric.
Thesis (1): e.g. "The division does not give the national government too much power, because the Tenth Amendment and reserved powers preserve substantial state authority."
Evidence (up to 3): the Tenth Amendment; the enumerated powers of Article I, Section 8; Federalist No. 51's "double security" of nation and states.
Reasoning (1): explain how reserved and concurrent powers leave states meaningful control.
Alternative perspective (1): concede that grants and the supremacy clause expand national reach, then argue states retain core powers.
Related dot points
- Topic 1.6 Principles of American Government: explain the constitutional principles of separation of powers and checks and balances, and how Federalist No. 51 addresses the dangers of tyranny.
A focused answer to AP US Government Topic 1.6: separation of powers, checks and balances, and the argument of Federalist No. 51, with concrete examples of how each branch checks the others and why this design protects against tyranny.
- Topic 1.8 Constitutional Interpretations of Federalism: explain how the appropriate balance of power between national and state governments has been interpreted differently over time.
A focused answer to AP US Government Topic 1.8: the commerce, necessary-and-proper, supremacy, and Tenth Amendment clauses, and how McCulloch v. Maryland and United States v. Lopez interpreted the national-state balance, with the SCOTUS Comparison skill.
- Topic 1.9 Federalism in Action: explain how the distribution of powers among three federal branches and between national and state governments impacts policymaking.
A focused answer to AP US Government Topic 1.9: how federalism plays out in real policy through the commerce clause, the Fourteenth Amendment, mandates, and grants, and how the balance of power shifts in areas like environmental, education, and marijuana policy.
- Topic 1.5 Ratification of the U.S. Constitution: explain the relationship between the compromises of the Constitutional Convention and the debate over the ratification of the Constitution.
A focused answer to AP US Government Topic 1.5: the Great (Connecticut) Compromise, the Three-Fifths Compromise, and the compromise over the slave trade, plus the Electoral College and amendment process that made ratification of the Constitution possible.
- Topic 1.3 Government Power and Individual Rights: explain the relationship between key provisions of the Articles of Confederation and the debate over the balance between government power and individual rights.
A focused answer to AP US Government Topic 1.3: the Federalist and Anti-Federalist debate over balancing government power against liberty, the arguments of Federalist No. 10, Brutus No. 1, and Federalist No. 51, and why the Bill of Rights was the price of ratification.
Sources & how we know this
- AP United States Government and Politics Course and Exam Description — College Board (2020)