McCulloch v. Maryland

McCulloch v. Maryland, 17 U.S. (4 Wheat.) 316 (1819), is a foundational decision of the United States Supreme Court delivered unanimously by Chief Justice John Marshall. The case arose when the State of Maryland imposed a tax on the Baltimore branch of the Second Bank of the United States, and James W. McCulloch, the branch cashier, refused to pay it. Two constitutional questions were presented: first, whether Congress had the power to incorporate a national bank, since no such authority is enumerated in Article I; and second, whether a state could tax an instrumentality of the federal government. Marshall answered the first in the affirmative and the second in the negative, producing the canonical statement of the doctrine of implied powers.

On the first question, Marshall grounded congressional authority in the Necessary and Proper Clause (Article I, Section 8, Clause 18). He rejected Maryland's reading of "necessary" as "absolutely indispensable," holding instead that "necessary" meant "convenient, or useful, or essential." The decisive formulation reads: "Let the end be legitimate, let it be within the scope of the constitution, and all means which are appropriate, which are plainly adapted to that end, which are not prohibited, but consist with the letter and spirit of the constitution, are constitutional." Marshall also affirmed the principle of national supremacy, observing that the Constitution and laws made in pursuance of it are supreme under the Supremacy Clause (Article VI), and that the federal government, though limited in its powers, is supreme within its sphere because it emanates from the people, not the states.

On the second question, Marshall reasoned that "the power to tax involves the power to destroy," and that permitting states to tax federal instrumentalities would allow them to defeat the legitimate operations of the national government—an inversion of the supremacy relationship. He therefore struck down the Maryland tax as unconstitutional. The case settled the broad-versus-strict construction debate that had divided Alexander Hamilton and Thomas Jefferson over the bank's chartering in 1791, decisively in favor of Hamiltonian loose construction. Its doctrine of intergovernmental tax immunity was later refined and partly narrowed in cases such as South Carolina v. Baker (1988), but the implied-powers holding remains intact and is the basis for the vast expansion of federal authority over the subsequent two centuries.

For the FSOT, McCulloch is a core item in both the Job Knowledge and US Government segments, where it is tested as one of the small canon of landmark Marshall Court cases alongside Marbury v. Madison (1803) and Gibbons v. Ogden (1824). Candidates should be able to pair the case with the Necessary and Proper Clause, the Supremacy Clause, the doctrine of implied powers, and Marshall's authorship. Typical exam angles ask which clause justified the national bank, what "power to tax involves the power to destroy" established, or which case is the origin of implied federal powers. Distinguish it sharply from Marbury (judicial review) and Gibbons (Commerce Clause and interstate navigation) to avoid the most common trap.