McCulloch v. Maryland (1819) is a required AP Gov Supreme Court case in which the Court ruled Congress could create a national bank under the Necessary and Proper Clause and that Maryland could not tax it under the Supremacy Clause, expanding national power over the states.
McCulloch v. Maryland is one of the 15 required Supreme Court cases in AP Gov, and it's the foundational one for federalism. Here's the setup. Congress chartered the Second Bank of the United States, and Maryland tried to tax the bank's Baltimore branch. James McCulloch, the bank's cashier, refused to pay. Two questions reached the Court. First, can Congress even create a bank when the Constitution never mentions one? Second, can a state tax a federal institution?
Chief Justice John Marshall answered yes and no, and both answers expanded national power. On question one, the Court used the Necessary and Proper Clause to say Congress has implied powers, meaning powers not listed in Article I but reasonably connected to carrying out its enumerated powers (like coining money and regulating commerce). A bank is a reasonable tool for those jobs, so it's constitutional. On question two, the Court used the Supremacy Clause to say states cannot tax or interfere with legitimate federal institutions, because "the power to tax involves the power to destroy." In one decision, Marshall gave Congress flexibility beyond its written powers and put the national government clearly above the states when the two conflict.
McCulloch lives in Topic 1.8 (Constitutional Interpretations of Federalism) in Unit 1, supporting learning objective AP Gov 1.8.A, which asks you to explain how the balance of power between national and state governments has shifted based on Supreme Court interpretations. The CED specifically flags the Necessary and Proper Clause as a power whose reach depends on how the Court reads it, and McCulloch is THE case where the Court read it broadly. Everything that comes later in the federalism story, from the New Deal's expansion of national power to debates over mandates and grants, builds on the constitutional foundation McCulloch laid. If you can explain this one case well, you can explain why the federal government today does so much more than Article I literally lists.
Keep studying AP® Gov Unit 1
United States v. Lopez (Unit 1)
Lopez (1995) is McCulloch's required-case counterweight. McCulloch expanded national power through the Necessary and Proper Clause, while Lopez limited it by ruling the Commerce Clause couldn't justify a federal gun-free school zones law. Together they show the Court can move the federalism balance in either direction, which is exactly the point of AP Gov 1.8.A.
Implied Powers (Unit 1)
McCulloch is where implied powers stop being a theory and become constitutional law. The Necessary and Proper Clause acts like a power multiplier, letting Congress do anything reasonably tied to its enumerated powers, and McCulloch is the case you cite to prove that multiplier exists.
Supremacy Clause (Unit 1)
The second half of McCulloch's holding rests entirely on Article VI's Supremacy Clause. Maryland's tax lost because a state law cannot undermine a valid federal action. When a question asks why federal law wins a conflict with state law, McCulloch is your go-to example.
Cooperative Federalism (Unit 1)
McCulloch made the modern federal role possible long before it existed. A broad reading of implied powers is what lets the national government later fund highways, schools, and healthcare through categorical and block grants, blurring the line between national and state responsibilities.
McCulloch is one of the 15 required Supreme Court cases, so you're expected to know its facts, constitutional issue, holding, and reasoning, not just its name. It can appear in multiple-choice questions about the Necessary and Proper Clause, the Supremacy Clause, or shifts in the federal-state balance. The biggest payoff is FRQ 3, the SCOTUS Comparison question, which gives you a nonrequired case and asks you to compare it to a required case. If the nonrequired case involves federalism or congressional power, McCulloch is a likely anchor. To earn points there, you need to state McCulloch's holding accurately (Congress can create the bank under implied powers; Maryland can't tax it under federal supremacy) and explain how its reasoning applies to or contrasts with the new case. It's also strong evidence in an Argument Essay about whether federalism favors national or state power.
Both are required Topic 1.8 federalism cases, so it's easy to blur them. The trick is direction and clause. McCulloch (1819) EXPANDED national power using the Necessary and Proper Clause and Supremacy Clause. Lopez (1995) LIMITED national power by saying the Commerce Clause has boundaries. If the question involves implied powers or a state taxing the federal government, it's McCulloch. If it involves the limits of regulating interstate commerce, it's Lopez.
McCulloch v. Maryland (1819) ruled that Congress can create a national bank under the Necessary and Proper Clause, establishing that Congress has implied powers beyond those listed in Article I.
The Court also ruled that Maryland could not tax the national bank, because under the Supremacy Clause states cannot interfere with legitimate federal institutions.
Chief Justice John Marshall's line 'the power to tax involves the power to destroy' explains why allowing state taxes on federal institutions would let states undermine the national government.
McCulloch shifted the balance of power toward the national government, which is the core skill tested by learning objective AP Gov 1.8.A on how Court interpretations change federalism over time.
Pair McCulloch with United States v. Lopez for exam answers, since McCulloch expanded national power and Lopez limited it, showing the Court can move federalism in both directions.
As a required case, McCulloch can serve as the comparison anchor on the SCOTUS Comparison FRQ whenever the nonrequired case deals with federal power versus state power.
The Supreme Court ruled in 1819 that Congress could create the Second Bank of the United States under the Necessary and Proper Clause, and that Maryland could not tax the bank because of the Supremacy Clause. Both holdings expanded national power relative to the states.
Yes. It's one of the 15 required Supreme Court cases in the AP Gov CED, covered in Topic 1.8 (Constitutional Interpretations of Federalism). You need to know its facts, constitutional issue, holding, and reasoning.
Not exactly. It said states cannot tax or interfere with legitimate federal institutions, because federal law is supreme under Article VI. States kept their own reserved powers; they just can't use them to obstruct valid federal actions.
McCulloch (1819) expanded national power through the Necessary and Proper Clause and Supremacy Clause, while Lopez (1995) limited national power by holding the Commerce Clause didn't authorize the Gun-Free School Zones Act. They're the two required federalism cases, pulling in opposite directions.
Two clauses did the work. The Necessary and Proper Clause (Article I, Section 8) justified Congress creating the bank through implied powers, and the Supremacy Clause (Article VI) blocked Maryland's tax on it.
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