The structural federalism viewpoint holds that the Commerce Clause of the United States Constitution (Article I, Section 8, Clause 3) grants Congress a real but limited power to regulate commerce among the states - not a general license to govern the national economy. Proponents argue that the clause's original meaning, properly understood, requires that regulated activity be genuinely commercial and genuinely interstate, and that courts have an affirmative duty to enforce those limits as structural features of constitutional design. This viewpoint is associated primarily with originalist legal scholars, libertarian constitutionalists, and conservative federalists, and found its most prominent judicial expression in the Rehnquist Court's federalism revival of the 1990s.
Structural federalists argue that the Commerce Clause cannot be read in isolation. The Constitution vests Congress only in the powers specifically enumerated in Article I, Section 8. The Tenth Amendment reinforces this by reserving unenumerated powers to the states or the people. Proponents hold that this structure was not accidental - it was a deliberate architectural choice to divide sovereignty between the federal government and the states, preserving the latter as independent political communities rather than mere administrative units of a centralized regime.
On this view, when Commerce Clause doctrine expands without limit, it effectively collapses the enumerated-powers framework. If Congress may regulate any activity that, in the aggregate, has a substantial effect on interstate commerce, then Congress can regulate virtually anything, since virtually any economic decision has some ripple effect across state lines. Advocates contend this renders enumeration meaningless.
A central pillar of the structural federalist argument is the claim that “commerce” in 1787 meant the buying, selling, and transportation of goods and commodities - trade, in the narrow sense - and did not encompass manufacturing, agriculture, mining, or purely local economic activity. Scholars in this tradition, most prominently Randy Barnett and Richard Epstein, argue that the post-New Deal reading of “commerce” to mean economic activity generally is a post hoc rationalization rather than an interpretation.
Proponents cite evidence from the founding era: the debates at Philadelphia, The Federalist Papers (particularly No. 45, in which James Madison describes the Commerce Clause as addressing external and interstate trade, not internal state governance), and the ordinary usage of “commerce” in eighteenth-century dictionaries and legal texts. They argue that “among the several states” further limits Congress to transactions that cross state lines, not merely transactions that affect interstate prices.
Structural federalists argue that the Commerce Clause empowers Congress to regulate those who engage in commerce - not to compel commerce as a precondition for regulating it. This argument received renewed attention during the constitutional litigation over the Affordable Care Act. Proponents contend that requiring individuals to purchase health insurance crosses a categorical line: Congress was regulating the mere fact of existing in an economy rather than any voluntary commercial act. The argument holds that a power to compel participation in commerce, if sustained, would leave no limiting principle.
Chief Justice John Roberts, writing for himself in NFIB v. Sebelius (2012), accepted this distinction, holding that the individual mandate could not be sustained under the Commerce Clause, even while upholding it as a tax. Structural federalists regard this as a partial vindication, though many argue the Court should have gone further.
Beyond textualism, structural federalists argue that the division of power between state and federal governments is not merely a technical feature of government organization but a substantive protection of individual liberty. States can serve as laboratories of democracy, experimenting with different regulatory approaches. Citizens can exit states whose policies they dislike. Competition among states disciplines overreach. Federal consolidation of regulatory authority eliminates these safeguards.
Proponents further argue that state governments are more accountable to local populations and more capable of calibrating policy to local conditions. Centralized federal regulation, even when within some abstract reading of congressional power, tends to impose uniform solutions on a diverse country - privileging particular regional or ideological preferences under the guise of national policy.
The Commerce Clause was drafted primarily to cure a defect of the Articles of Confederation, under which states erected trade barriers against one another and undermined the commercial unity the framers regarded as essential. Early Commerce Clause jurisprudence, including Chief Justice John Marshall's decision in Gibbons v. Ogden (1824), confirmed broad congressional authority over navigation and interstate transportation. Structural federalists do not dispute this core application; they argue it remains within the text's natural meaning.
Through the nineteenth century, the Court maintained distinctions between commerce and manufacturing (United States v. E.C. Knight Co., 1895), and between direct and indirect effects on interstate commerce. These distinctions, structural federalists argue, represented a good-faith effort to give the clause its proper scope without reducing Congress to impotence.
The structural federalist narrative identifies the New Deal-era constitutional crisis as the pivotal rupture. Facing a Court that had struck down New Deal programs as beyond congressional power, President Franklin Roosevelt proposed his Court-packing plan in 1937. The Supreme Court's subsequent shift - often called “the switch in time that saved nine” - produced decisions dramatically expanding Commerce Clause authority. NLRB v. Jones & Laughlin Steel Corp. (1937) and Wickard v. Filburn (1942), which held that a farmer growing wheat for his own consumption could be regulated because his decision, multiplied across all farmers, would affect interstate wheat prices, represent the furthest extensions of this expansion.
Structural federalists regard Wickard as the paradigm case of interpretive overreach. They argue that the “aggregation principle” it established effectively dissolved any meaningful limit on congressional power, since virtually any local activity, taken in the aggregate, affects interstate markets.
After decades of largely unchallenged Commerce Clause expansion, the Rehnquist Court reinvigorated limits in two major decisions. United States v. Lopez (1995) struck down the Gun-Free School Zones Act, holding that possession of a gun near a school was not an economic activity and bore no substantial relation to interstate commerce. United States v. Morrison (2000) struck down the civil remedy provision of the Violence Against Women Act on similar grounds.
Structural federalists regard these decisions as modest correctives rather than radical departures. Both decisions acknowledged that Congress retains broad commerce power; they simply held that some activities - guns near schools, gender-motivated violence - fall outside it. Critics of the structural federalist view argued the decisions were results-oriented; proponents respond that they merely applied a limiting principle the Court had abandoned in 1937.
Randy Barnett - Professor at Georgetown Law Center and perhaps the most prominent academic advocate of the structural federalist reading. Author of Restoring the Lost Constitution (2004), which argues for a presumption of liberty and strict enforcement of enumerated powers. Argued NFIB v. Sebelius before the Supreme Court.
Richard Epstein - Professor at New York University School of Law. Argues from a classical liberal perspective that the Commerce Clause's expansion has enabled progressive regulatory programs that violate property rights and economic liberty. Author of The Classical Liberal Constitution (2014).
Chief Justice William Rehnquist - Authored the majority opinions in both Lopez and Morrison. Held that the Commerce Clause requires a substantial economic nexus and that congressional findings alone cannot manufacture that nexus.
Justice Clarence Thomas - Has written separately to argue that even the Lopez framework does not go far enough, and that the Court should revisit the substantial effects test and return to the original meaning of “commerce” as trade and exchange.
Justice Antonin Scalia - More complicated figure within this tradition. Joined the Lopez and Morrison majorities but also concurred in the judgment in Gonzales v. Raich (2005), upholding federal regulation of locally grown medical marijuana under the aggregation principle - a decision structural federalists widely regard as an inconsistency or retreat.
Roger Pilon - Senior fellow at the Cato Institute. Has argued extensively that post-New Deal Commerce Clause doctrine represents an extra-constitutional transformation of American government.
Structural federalists disagree about how much of post-New Deal doctrine should be disturbed. Moderate originalists, including some associated with the Federalist Society mainstream, accept Wickard's aggregation principle as settled law while arguing for applying it more rigorously and refusing to extend it further. More thoroughgoing originalists, including Justice Thomas and scholars like Barnett, argue that Wickard was wrongly decided and should be overruled. Critics within the movement note that unwinding Wickard would call into question vast swaths of existing federal regulatory law, including environmental and labor statutes, creating practical and political difficulties.
Structural federalists disagree about how much weight stare decisis should receive when precedent conflicts with original meaning. Some argue that long-settled precedents acquire a kind of constitutional legitimacy through reliance and institutional practice. Others, following Justice Thomas's jurisprudence more closely, argue that an erroneous constitutional holding is not cured by repetition. This internal tension - between the need for legal stability and the imperative to restore constitutional text - is unresolved within the movement.
The Necessary and Proper Clause (Article I, Section 8, Clause 18) allows Congress to enact laws “necessary and proper” to carry out its enumerated powers. Structural federalists debate how much independent work this clause can do in expanding Commerce Clause authority. McCulloch v. Maryland (1819) read the clause broadly. Some structural federalists accept this reading as correct but argue it cannot stretch to cover activity unconnected to any enumerated power. Others argue that post-New Deal courts have used the Necessary and Proper Clause as a second avenue of expansion, compounding the Commerce Clause's overextension.
1. U.S. Const. art. I, § 8, cl. 3. 2. U.S. Const. amend. X. 3. Alexander Hamilton, James Madison, and John Jay, The Federalist Papers, No. 45 (James Madison) (1788; repr., New York: Penguin, 1987). 4. Gibbons v. Ogden, 22 U.S. (9 Wheat.) 1 (1824). 5. United States v. E.C. Knight Co., 156 U.S. 1 (1895). 6. NLRB v. Jones & Laughlin Steel Corp., 301 U.S. 1 (1937). 7. Wickard v. Filburn, 317 U.S. 111 (1942). 8. United States v. Lopez, 514 U.S. 549 (1995). 9. United States v. Morrison, 529 U.S. 598 (2000). 10. NFIB v. Sebelius, 567 U.S. 519 (2012). 11. Gonzales v. Raich, 545 U.S. 1 (2005). 12. McCulloch v. Maryland, 17 U.S. (4 Wheat.) 316 (1819). 13. Randy E. Barnett, Restoring the Lost Constitution: The Presumption of Liberty (Princeton: Princeton University Press, 2004). 14. Richard A. Epstein, The Classical Liberal Constitution: The Uncertain Quest for Limited Government (Cambridge: Harvard University Press, 2014). 15. Roger Pilon, “Madison's Vision of Federalism,” Cato Supreme Court Review (2000): 1-20. 16. Justice Clarence Thomas, concurring in Lopez, 514 U.S. at 584-602 (arguing for return to original meaning of “commerce”).