In Gonzales v. Raich, decided in 2005, the U.S. Supreme Court held 6–3 that Congress’s power to regulate interstate commerce lets it prohibit the cultivation and use of marijuana for medical purposes even when a state has legalized it. The ruling meant that California patients following their state’s Compassionate Use Act could still be prosecuted under federal law, and it remains good law today, though a 2026 federal rescheduling has eased part of the conflict for state-licensed medical cannabis.
Who Sued and What Happened
Angel Raich had an inoperable brain tumor and several other severe chronic conditions. Her doctors had tried alternative medications and found them either ineffective or intolerable, and concluded cannabis was medically necessary. Two caregivers grew her supply. The second plaintiff, Diane Monson, cultivated her own plants at home. Both women complied with California law.1Cornell Law Institute. Ashcroft v Raich – Supreme Court Bulletin
On August 15, 2002, county sheriff’s deputies and federal Drug Enforcement Administration agents went to Monson’s home. County officials concluded her use was lawful under state law. The federal agents disagreed. After a three-hour standoff between local and federal authorities, the DEA seized and destroyed all six of her plants. The women then sued, arguing Congress had no constitutional authority to reach purely local, non-commercial activity that a state had expressly legalized.
The Laws in Conflict
California’s Compassionate Use Act, approved by voters in 1996, let patients with serious illnesses use marijuana on a physician’s recommendation without state criminal liability. It covered conditions including cancer, AIDS, chronic pain, glaucoma, and arthritis, and it protected designated primary caregivers who helped patients obtain their supply.2California Legislative Information. California Health and Safety Code 11362.5 – Compassionate Use Act of 1996
Federal law pointed the other way. The Controlled Substances Act, enacted in 1970, sorts drugs into five schedules based on abuse potential, accepted medical value, and safety.3Office of the Law Revision Counsel. 21 USC Chapter 13 – Drug Abuse Prevention and Control Schedule I is the most restrictive tier, reserved for substances the federal government considers to have high abuse potential, no accepted medical use, and no safe method of administration even under medical supervision.4Office of the Law Revision Counsel. 21 USC 812 – Schedules of Controlled Substances At the time of the case, marijuana sat in Schedule I alongside heroin and LSD, with no federal exception for state-authorized medical use.
What the Supreme Court Decided
Justice John Paul Stevens, writing for the majority, held that Congress’s Commerce Clause authority “includes the power to prohibit the local cultivation and use of marijuana in compliance with California law.”5Justia. Gonzales v Raich
Two ideas carried the opinion. First, the Court did not need to find that homegrown medical marijuana actually affected interstate commerce. It only needed to find that Congress had a “rational basis” for believing it could, and drug production and consumption are inherently economic.6Cornell Law Institute. Gonzales v Raich Second, carving out an exception for locally grown medical marijuana would undermine the Controlled Substances Act as a whole, because there would be no workable way to separate exempt plants from those bound for the illegal market.
The majority leaned on Wickard v. Filburn, the 1942 decision that let Congress regulate a farmer’s wheat grown for his own livestock feed because the aggregated effect of many farmers doing the same would move the interstate wheat market.7Justia. Wickard v Filburn The same aggregation logic applied to homegrown cannabis: no single plant crossed a state line, but many patients growing their own would.
The Court distinguished Raich from United States v. Lopez and United States v. Morrison, cases where it had struck down federal laws reaching non-economic conduct like gun possession near schools and gender-motivated violence.9Justia. United States v Lopez
On the state–federal conflict, the Court invoked the Supremacy Clause: “if there is any conflict between federal and state law, federal law shall prevail,” and federal commerce power is “superior to that of the States to provide for the welfare or necessities of their inhabitants, however legitimate or dire those necessities may be.”8Justia. Gonzales v Raich
The Dissents
Justice Sandra Day O’Connor, joined by Chief Justice William Rehnquist, wrote the principal dissent. Her worry was structural. If the Commerce Clause reaches a cancer patient growing six plants in her backyard under a doctor’s orders, it is hard to picture what it cannot reach. O’Connor invoked the idea of states as “laboratories for experiment” and argued the majority’s reasoning strips states of the ability to try different approaches on issues like medical marijuana.5Justia. Gonzales v Raich
Justice Clarence Thomas dissented separately and went further. He argued the constitutional word “commerce” means trade or exchange, and that possessing something you grew on your own property for your own consumption is not trade under any reasonable definition. Thomas called the majority’s reading of federal power “virtually unfettered,” warning it opened a path for Congress to reach essentially any personal activity by claiming an aggregate market effect.5Justia. Gonzales v Raich
What the Ruling Meant for Patients
Raich left medical marijuana patients in an uncomfortable spot. They could follow state law exactly and still face federal charges. A first federal offense for simple possession carries a minimum $1,000 fine and up to one year in jail, and cultivation triggers much steeper penalties.10Office of the Law Revision Counsel. 21 USC 844 – Penalties for Simple Possession The ruling did not force any state to repeal its medical program, but it stripped those programs of any shield against federal enforcement. For years, the working question was not whether the Justice Department could prosecute, but whether it would.
One practical restraint came through the annual federal budget. Starting in 2014, Congress attached a spending rider, commonly called the Rohrabacher-Blumenauer amendment, that bars the Department of Justice from using funds to interfere with state medical marijuana programs. It is not permanent law and must be renewed each fiscal year, but while in force it has functioned as a working ceasefire between federal drug enforcement and state-legal medical operations.
The decision carried a consequence many patients did not see coming. Federal law prohibits anyone who uses a controlled substance illegally from possessing firearms or ammunition.11Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Because marijuana remained Schedule I under federal law regardless of state authorization, medical cannabis patients were technically barred from buying or owning guns. That conflict still exists for recreational users and for medical users whose marijuana does not fall within the narrow categories rescheduled in 2026.
What Changed in 2026
Marijuana’s Schedule I status held for over two decades after Raich even as more states legalized. In April 2026, the Justice Department and DEA issued an order that immediately moved two categories of marijuana from Schedule I to Schedule III: FDA-approved products containing marijuana, and marijuana regulated under a qualifying state medical marijuana license.12United 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 An expedited administrative hearing was scheduled to begin June 29, 2026, to consider whether all forms of marijuana should be moved to Schedule III through formal rulemaking.
The rescheduling does not touch recreational marijuana or unlicensed cultivation, which stay in Schedule I. And Raich itself remains good law. The core holding, that Congress can regulate local drug activity under the Commerce Clause, has not been overturned, and the 2026 shift came through executive action rather than a court ruling that the old classification was unconstitutional. The rescheduling operates inside the framework Raich upheld: Congress and the executive branch decide how substances are classified, and the states work within whatever space federal policy leaves open.