In Gonzales v. Raich, 545 U.S. 1 (2005), the Supreme Court ruled 6–3 that Congress may prohibit the cultivation and use of marijuana grown at home for personal medical use, even in states that have legalized it, because the Commerce Clause reaches purely local, noncommercial activity when that activity is part of a broader regulated interstate market.1Justia. Gonzales v. Raich, 545 US 1 (2005) The decision left patients complying with California’s medical marijuana law still exposed to federal prosecution, and it stands today as one of the broadest modern readings of congressional commerce power.
How the Case Reached the Court
Angel Raich and Diane Monson were California residents using marijuana to treat serious medical conditions. Both were covered by California’s Compassionate Use Act, a 1996 voter initiative that shielded patients and caregivers from state penalties for possessing or growing marijuana on a doctor’s recommendation.2California Legislative Information. California Code HSC 11362.5 – Compassionate Use Act of 1996 Monson grew her own plants. Raich received hers at no cost from caregivers. No money changed hands, and none of the marijuana crossed a state line.
In August 2002, county sheriff’s deputies and federal DEA agents arrived at Monson’s home. Local officers confirmed her garden was legal under California law. Federal agents seized and destroyed six plants anyway. Raich and Monson sued to block further federal enforcement. The Ninth Circuit sided with the patients, holding that applying the Controlled Substances Act to their conduct likely exceeded Congress’s commerce power. The federal government took the case to the Supreme Court.
The Constitutional Question
The case turned on the Commerce Clause, which authorizes Congress “[t]o regulate Commerce with foreign Nations, and among the several States.”3Constitution Annotated. Article I Section 8 Clause 3 Could that power reach a plant grown at home, consumed at home, and never sold?
The answer determined the fate of the Controlled Substances Act as applied to medical users. The Act’s own findings declared that locally possessed controlled substances feed into interstate traffic and cannot practically be separated from drugs moving across state lines.4Office of the Law Revision Counsel. 21 USC 801 – Congressional Findings and Declarations Marijuana sat on Schedule I, treated by federal law as having a high potential for abuse and no accepted medical use.5Office of the Law Revision Counsel. 21 US Code 812 – Schedules of Controlled Substances
What made the question genuinely open was the Court’s own recent case law. In United States v. Lopez (1995), the Court struck down the Gun-Free School Zones Act, holding that gun possession near a school was not economic activity. In United States v. Morrison (2000), the Court invalidated part of the Violence Against Women Act on similar grounds. Those rulings suggested real limits on the commerce power, and the patients argued their situation fit the same pattern: a noncommercial act with no interstate dimension.
The Ruling
On June 6, 2005, the Court reversed the Ninth Circuit 6–3. Justice John Paul Stevens wrote the majority opinion, joined by Justices Kennedy, Souter, Ginsburg, and Breyer. Justice Scalia concurred in the judgment on separate reasoning. Justice O’Connor dissented, joined by Chief Justice Rehnquist and Justice Thomas. Thomas also wrote his own dissent.1Justia. Gonzales v. Raich, 545 US 1 (2005)
The upshot for patients: state law offered no defense to federal prosecution. Federal agents could continue enforcing the Controlled Substances Act against people who complied fully with California’s medical marijuana program.
The Majority’s Reasoning
Stevens grounded the decision in Wickard v. Filburn (1942), which upheld federal wheat quotas against a farmer growing wheat to feed his own household. One farmer’s home-consumed wheat was trivial, but the aggregate effect of all such farmers on the national wheat market was substantial enough to justify federal regulation.6Justia. Wickard v. Filburn, 317 US 111 (1942)
The majority found the parallel to marijuana “striking.” Marijuana is a fungible commodity with an established interstate market, illegal though it is. Homegrown supply displaces purchases that would otherwise happen on that market and creates a constant risk of diversion into it. Congress needed only a rational basis for concluding that leaving home-consumed marijuana unregulated would undermine the larger regulatory scheme, and the Court found that basis without difficulty.1Justia. Gonzales v. Raich, 545 US 1 (2005)
How the Majority Distinguished Lopez and Morrison
Stevens conceded that Lopez and Morrison imposed limits on the commerce power, but treated Raich as a different kind of case. Those earlier decisions struck down statutes that had, in the Court’s words, “nothing to do with commerce or any sort of economic enterprise.” The Controlled Substances Act, by contrast, was a comprehensive regulatory scheme aimed at a commodity market. The patients were not challenging the statute as a whole; they were asking the Court to carve out individual applications. When a class of regulated activity falls within the commerce power, the majority held, courts cannot pick out specific instances just because a particular case looks small.1Justia. Gonzales v. Raich, 545 US 1 (2005)
Scalia’s Concurrence
Justice Scalia agreed with the outcome but rested it on different ground. In his view, purely local, noncommercial activity is not itself interstate commerce and cannot be regulated under the Commerce Clause alone. He turned instead to the Necessary and Proper Clause, which lets Congress pass laws reasonably adapted to carrying out its enumerated powers. Banning homegrown marijuana was necessary, he argued, to make the interstate drug regulation effective.7Legal Information Institute. Gonzales v. Raich – Scalia Concurrence
The distinction has real consequences. The majority’s rationale suggests any local activity with aggregate market effects can be reached under the Commerce Clause directly. Scalia’s is narrower: local activity can be reached only when regulating it is a necessary piece of a broader scheme targeting interstate commerce.
The Dissents
Justice O’Connor’s dissent framed the ruling as a threat to federalism. If Congress could reach into a backyard garden to regulate a plant grown for personal medical use, she asked, what activity would remain outside the commerce power? States, she wrote, had long held the authority to protect the health and safety of their own residents. California had exercised that authority through the Compassionate Use Act, and the federal override eliminated the ability of states to act as what Justice Brandeis called “laboratories” for policy experiments.1Justia. Gonzales v. Raich, 545 US 1 (2005)
Justice Thomas wrote separately, making an originalist argument. “Commerce,” as the Founders used the word, meant buying, selling, and transporting goods. A plant grown at home for personal use had never been bought, sold, or moved anywhere. He warned that the majority’s reading left congressional power “virtually unfettered,” effectively abandoning the notion of a federal government of limited, enumerated powers.8Legal Information Institute. Gonzales v. Raich – Thomas Dissent
Why the Case Still Matters
Raich confirmed that Congress can regulate purely local, noncommercial activity when that activity involves a commodity traded in interstate markets and when regulation is part of a comprehensive statutory scheme. The aggregation principle from Wickard, which many observers thought Lopez and Morrison had begun to limit, proved durable.
Its reach was tested in National Federation of Independent Business v. Sebelius (2012). Chief Justice Roberts distinguished Raich by drawing a line between regulating existing activity, such as growing marijuana, and compelling people to enter a market they had chosen to stay out of, such as buying health insurance. The Commerce Clause could reach what people do but not force them to do something. That line kept Raich intact while setting a new outer boundary on the commerce power.9Justia. National Federation of Independent Business v. Sebelius, 567 US 519 (2012)
Changes to marijuana’s scheduling do not disturb the constitutional holding. In April 2026, the Department of Justice and DEA placed FDA-approved marijuana products and products regulated under a qualifying state medical license into Schedule III, while leaving unlicensed bulk marijuana, recreational marijuana, and synthetic cannabis on Schedule I.10United States Department of Justice. Justice Department Places FDA-Approved Marijuana Products and Products Containing Marijuana Subject to a Qualifying State-issued License in Schedule III Someone growing marijuana at home without a state medical license remains in the same federal legal position as Monson and Raich. Even if marijuana were removed from the Controlled Substances Act entirely, Raich would still stand for the broader proposition that Congress can regulate local, noncommercial activity that forms part of a class with substantial effects on interstate markets, a principle that reaches into environmental regulation, agriculture, and any other area where local conduct feeds into a national market.