In Gonzales v. Raich (2005), the Supreme Court held 6-3 that the federal government may enforce the Controlled Substances Act against people who grow and use marijuana at home for medical purposes, even when a state has legalized that conduct. Writing for the majority, Justice Stevens concluded that Congress’s power to regulate interstate commerce reaches purely local, non-commercial cultivation because such activity, added up across the country, substantially affects the national market for marijuana. The ruling remains one of the most consequential Commerce Clause decisions of the modern era.
The Facts of the Case
Angel Raich and Diane Monson were California residents who used marijuana for serious medical conditions. Raich suffered from multiple debilitating illnesses. Monson grew her own plants to manage chronic pain. Both acted within California’s Compassionate Use Act of 1996, which shielded patients and caregivers from state prosecution when a physician recommended marijuana for conditions such as cancer, chronic pain, glaucoma, and AIDS.1California Legislative Information. California Code HSC 11362.5 – Compassionate Use Act of 1996
In August 2002, county sheriff’s deputies and federal Drug Enforcement Administration agents arrived at Monson’s home. Local officials confirmed the cultivation was legal under state law. Federal agents seized and destroyed six marijuana plants anyway. Under federal law, marijuana is a Schedule I controlled substance, the most restrictive category, alongside heroin and LSD.2Office of the Law Revision Counsel. 21 USC 812 – Schedules of Controlled Substances
Raich and Monson sued for an injunction against further federal interference. Their argument was straightforward. Plants grown at home, consumed by the grower, never sold and never taken across a state line, are purely local activities the federal government cannot reach. The case climbed through the courts and landed at the Supreme Court on a single question: could the Controlled Substances Act override California’s medical marijuana protections?
How the Court Reasoned
Justice Stevens’s majority opinion classified marijuana cultivation as economic activity because it involves the production and consumption of a commodity for which an established interstate market exists. Any act of growing marijuana counts as production under that framework, whether or not money changes hands and whether or not the plant ever leaves the grower’s property.3Justia. Gonzales v. Raich, 545 U.S. 1
The reasoning drew heavily on Wickard v. Filburn (1942), where the Court upheld federal wheat quotas against a farmer who grew wheat only to feed his own livestock. The Court reasoned then that if many farmers did the same, cumulative home production would depress the national wheat market and undermine federal price controls.4Justia. Wickard v. Filburn, 317 U.S. 111 That “aggregation principle” carried the day in Raich too. One patient’s garden might be trivial, but the class of similar activity was not.
A second piece of the reasoning was fungibility. Marijuana grown in Monson’s garden is physically indistinguishable from marijuana sold on the illicit market. Because the product is interchangeable, the Court concluded, the federal government cannot effectively regulate the interstate drug trade without also reaching local production. Homegrown medical marijuana, left alone, would function as a substitute for marijuana bought through interstate channels, exactly as the homegrown wheat in Wickard substituted for wheat the farmer would otherwise have purchased.
The majority also stressed a practical enforcement problem. If personal medical use were carved out of the Controlled Substances Act, separating legal medical marijuana from illegal recreational marijuana would be nearly impossible. Locally grown supplies could leak into the interstate market with no reliable way to trace them. The Court concluded that “failure to regulate the intrastate manufacture and possession of marijuana would leave a gaping hole in the CSA.”5Legal Information Institute. Gonzales v. Raich
The Court distinguished two recent decisions that had trimmed federal power. 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 affecting interstate commerce.6Justia. United States v. Lopez, 514 U.S. 549 In United States v. Morrison (2000), it struck down part of the Violence Against Women Act, holding that Congress could not regulate noneconomic violent conduct on aggregation grounds alone.7Legal Information Institute. United States v. Morrison Those cases, the majority explained, involved noneconomic conduct with no connection to a broader regulatory scheme. The Controlled Substances Act is a comprehensive framework covering the national market in controlled substances, and Congress has broader authority to sweep in local activity when doing so is essential to make such a scheme work.
The Holding
By a 6-3 vote, the Court ruled that the Controlled Substances Act’s prohibition on marijuana cultivation and possession is a valid exercise of the Commerce Clause power, even as applied to individuals growing small amounts for personal medical use under state law. Justice Stevens delivered the opinion, joined by Justices Kennedy, Souter, Ginsburg, and Breyer.5Legal Information Institute. Gonzales v. Raich
Federal law therefore preempted California’s Compassionate Use Act as a shield against federal prosecution. Federal agents could keep making arrests, seizing property, and bringing charges regardless of a patient’s compliance with state law. Congress, the Court held, was not required to carve out exceptions for specific local uses when it created a comprehensive scheme prohibiting a commodity outright. An exemption for medical use would undermine the whole structure.
Scalia’s Concurrence
Justice Scalia joined the outcome but wrote separately. Rather than relying only on the Commerce Clause, he grounded his vote in the Necessary and Proper Clause, which allows Congress to “make all Laws which shall be necessary and proper for carrying into Execution” its enumerated powers.8Constitution Annotated. Article 1 Section 8 Clause 18 Regulating local cultivation, in his view, was a necessary component of making the broader federal scheme effective. His approach suggested a narrower principle than the majority’s: not that Congress can always reach local economic activity, but that it can reach it when doing so is genuinely necessary to enforce a valid comprehensive scheme.
The Dissents
Justice O’Connor
Justice O’Connor, joined in part by Chief Justice Rehnquist and Justice Thomas, dissented on federalism grounds. She invoked the familiar image of states as laboratories of democracy and argued that California’s medical marijuana program was exactly the sort of local experiment the federal system was built to protect. The Court, she wrote, “sanctions an application of the federal Controlled Substances Act that extinguishes that experiment, without any proof” that personal medical cultivation has a substantial effect on interstate commerce.3Justia. Gonzales v. Raich, 545 U.S. 1
The marijuana at issue, she pointed out, was never in the stream of commerce. No one bought it, no one sold it, and even the growing supplies were local. Allowing the Commerce Clause to reach this activity effectively converted congressional authority into “a general police power of the sort retained by the States.” She added a striking personal note: she herself would not have voted for California’s law, but federalism principles required protecting the state’s right to try.
Justice Thomas
Justice Thomas wrote the most forceful dissent. He challenged the expansion of “commerce” from its original meaning of buying, selling, and transporting goods into something broad enough to cover growing a plant in your backyard. Raich and Monson “neither buy nor sell the marijuana that they consume,” he wrote. Their conduct “never crosses state lines, much less as part of a commercial transaction.”9Legal Information Institute. Gonzales v. Raich – Thomas Dissent
The majority’s logic, he warned, had no limiting principle. “If Congress can regulate this under the Commerce Clause, then it can regulate virtually anything—and the Federal Government is no longer one of limited and enumerated powers.” Pushed to its extreme, he argued, the reasoning would let the federal government “regulate quilting bees, clothes drives, and potluck suppers throughout the 50 States.”9Legal Information Institute. Gonzales v. Raich – Thomas Dissent
Why State Medical Marijuana Laws Still Exist
If Raich confirmed that federal drug law overrides state medical marijuana protections, why do state programs still exist? The answer lies in a separate constitutional principle the case did not touch: the anti-commandeering doctrine.
Congress cannot force state governments to enforce federal law or administer federal regulatory programs. The Supreme Court established this in Printz v. United States (1997), holding that the federal government “may neither issue directives requiring the States to address particular problems, nor command the States’ officers … to administer or enforce a federal regulatory program.”10Legal Information Institute. Printz v. United States, 521 U.S. 898 Such commands, the Constitution Annotated summarizes, are “fundamentally incompatible with our constitutional system of dual sovereignty.”11Constitution Annotated. Anti-Commandeering Doctrine
In practical terms, Raich authorized federal agents to enforce federal marijuana law, but it did not require state and local police to help. States remain free to legalize marijuana under their own laws, run patient registries, license dispensaries, and tell their own officers not to arrest people acting within state rules. Washington keeps the authority to intervene, but it lacks the manpower to police marijuana in every state without local cooperation. That gap between federal authority and federal capacity is why state programs kept expanding after Raich rather than collapsing.
What Has Happened Since 2005
Roughly 40 states and the District of Columbia now allow medical marijuana in some form, a large expansion from the handful of programs in place when Raich was decided. Several dozen states have gone further and legalized recreational use for adults.
Federal enforcement policy has shifted with the political tide. In 2013, the Department of Justice issued the Cole Memorandum, directing prosecutors to deprioritize marijuana cases in states with strong regulatory programs and to focus instead on distribution to minors, cartel activity, and interstate trafficking. Attorney General Jeff Sessions rescinded that guidance in January 2018. The practical effect was limited because Congress had already stepped in through annual appropriations riders barring the Department of Justice from spending funds to interfere with state medical marijuana programs.
The scheduling of marijuana itself is now moving. Effective April 28, 2026, a DEA final order moved marijuana in FDA-approved drug products and marijuana subject to state medical marijuana licenses from Schedule I to Schedule III.12U.S. Department of Justice. Justice Department Places FDA-Approved Marijuana Products and Products Containing Marijuana An expedited administrative hearing beginning June 29, 2026 will consider whether to downschedule all forms of marijuana to Schedule III through formal rulemaking. Unlicensed marijuana, bulk marijuana, and non-FDA-approved derivatives remain in Schedule I during the process. Rescheduling to Schedule III would not legalize marijuana, but it would reduce federal penalties, open certain research doors, and ease tax burdens on state-licensed businesses.
Where Raich Sits in Commerce Clause Law Today
Raich remains the high-water mark of modern Commerce Clause power. It confirmed that when Congress builds a comprehensive regulatory scheme over a national market, it can reach deep into purely local activity to prevent gaps in the regulatory net. It told states they could pass marijuana laws but could not shield their residents from federal prosecution. And it told individuals that compliance with state law is no defense against a federal charge.
The dissents have aged into something close to a roadmap for the workarounds that followed. O’Connor’s prediction that states would keep experimenting proved right, though not because the Court protected the right to do so. Anti-commandeering and limited federal enforcement resources kept state programs viable without the Court’s blessing. Thomas’s warning about limitless federal power continues to resonate in constitutional debates and is regularly cited by scholars and litigants who argue the Commerce Clause has been stretched beyond recognition.
The tension the case exposed between federal supremacy and state autonomy has not been resolved by any later decision. It has been managed, year by year, through appropriations riders, enforcement discretion, and the slow machinery of administrative rescheduling. For anyone tracing the evolution of marijuana law or the outer limits of federal power, Raich is where the modern story starts.