National Federation of Independent Business v. Sebelius
The Supreme Court upheld the Affordable Care Act's requirement that most Americans buy health insurance, but not under the power Congress relied on. The Court said Congress could not force people into commerce under the Commerce Clause, but could achieve the same result by taxing people who go without insurance.
The Court also ruled that Congress went too far by threatening to cut off all of a state's existing Medicaid funding if it refused to expand the program to more low-income adults, calling that an unconstitutionally coercive 'gun to the head.' The fix: states could keep their old Medicaid money even if they declined the expansion.
How it got here: A federal district court struck down the mandate and the entire Act; the Eleventh Circuit agreed the mandate was unconstitutional but preserved the rest of the law; both sides sought Supreme Court review.
The Case in Depth
What happened
In 2010 Congress passed the Affordable Care Act to expand health insurance coverage nationwide. Two provisions were challenged: the individual mandate, requiring most people to buy insurance or pay a penalty, and the Medicaid expansion, which required states to cover more low-income adults or risk losing all federal Medicaid funds. Twenty-six states, several individuals, and a business group sued, arguing Congress lacked the constitutional power to enact either provision.
The question before the Court
Could Congress require nearly all Americans to buy health insurance, and could it threaten states with losing all their Medicaid money if they refused to expand the program?
The Court's answer
Partly — the Court upheld the individual mandate, but not for the reason the government primarily argued. It ruled that Congress could not use the Commerce Clause to force people who weren't engaged in any economic activity to buy health insurance, because that would let Congress regulate inactivity as well as activity, with no clear limit. But because the mandate could reasonably be read as a tax on people who go without insurance rather than a legal command to buy it, the Court upheld it under Congress's power to tax.
On the second question, the Court said no — Congress could not threaten to take away a state's entire existing Medicaid budget just because it declined to accept the ACA's Medicaid expansion. That threat was so large it left states no real choice, crossing the line from encouragement into unconstitutional coercion. The fix was narrow: states could keep their existing Medicaid money even if they turned down the expansion, and the rest of the law stayed in place.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Roughly 40 million Americans anticipated new insurance requirements, and the ruling let the ACA's insurance markets go forward largely intact. But because states could no longer be forced to expand Medicaid, many chose not to, leaving millions of low-income adults in those states without new coverage options for years afterward.
What changes now
The individual mandate remained in force as a tax, and the ACA's other insurance reforms continued to operate nationwide. Because the Medicaid expansion could no longer be forced on states through the threat of losing all existing funding, states were left free to choose whether to expand Medicaid, and many initially declined, creating a coverage gap for low-income adults in those states. This was a final merits decision, not subject to further proceedings on the core constitutional questions.
What this does not decide
The ruling does not mean Congress generally lacks power to require people to act; it turned on the specific history and structure of the Commerce Clause and the particular design of the Medicaid threat. The Court did not set a precise line for when spending conditions become coercive, leaving that question for future disputes.
Concurrences and dissents
Dissent in part — Justice Ginsburg
Justice Ginsburg agreed the mandate could be upheld as a tax but argued the Commerce Clause independently supported it too, criticizing the majority's activity/inactivity distinction as ahistorical. She also dissented from the holding that the Medicaid expansion was unconstitutionally coercive, arguing Congress had long had the power to expand Medicaid by amendment and that no state lacked fair notice.
Dissent — Justice Scalia
“To go beyond that, and to say the failure to grow wheat (which is not an economic activity, or any activity at all) nonetheless affects commerce and therefore can be federally regulated, is to make mere breathing in and out the basis for federal prescription and to extend federal power to virtually all human activity.”The joint dissent's warning about where the Commerce Clause argument for the mandate would lead.
Justice Scalia, joined by Kennedy, Thomas, and Alito, argued the entire Affordable Care Act should fall. They contended the mandate exceeded the Commerce and Necessary and Proper Clauses, that it could not be rewritten as a tax because Congress clearly framed it as a penalty, and that the Medicaid expansion was coercive and inseverable from the rest of the interconnected statute.
Dissent — Justice Thomas
Justice Thomas joined the joint dissent but wrote separately to reiterate his long-standing view that the Court's 'substantial effects' test for the Commerce Clause is itself inconsistent with the Constitution's original meaning, arguing this case shows how that test has let the federal government claim it can regulate inactivity as well as activity.
How the Court got there
The legal reasoning, step by step
- The Court first asked whether the Anti-Injunction Act, which normally blocks lawsuits over taxes until after they're paid, barred this challenge. Because Congress called the mandate's charge a 'penalty' rather than a 'tax' in the statute's text, the Court found the Act did not apply and the case could proceed.
- Turning to the Commerce Clause, the Court held that Congress's power to 'regulate' commerce presupposes some existing commercial activity to regulate. Because the mandate forced people who were doing nothing into the insurance market, the Court concluded this went beyond regulating commerce to compelling it, something Congress had never done before.
- The Court likewise rejected the argument that the Necessary and Proper Clause could rescue the mandate, reasoning that letting Congress create the precondition for exercising an enumerated power, rather than simply carrying out that power, would grant it open-ended authority with no natural stopping point.
- Because a law should be read to avoid a constitutional problem if a reasonable alternative reading exists, the Court asked whether the mandate could instead be understood as a tax on those who go without insurance. Looking at how the payment was calculated, collected, and enforced, the Court concluded it functioned enough like a tax to be upheld under Congress's taxing power.
- On the Medicaid expansion, the Court applied its spending-power precedents, which allow Congress to attach conditions to federal grants but not to cross the line from persuasion into coercion. Because states stood to lose all existing Medicaid funding, worth more than 10% of many state budgets, for declining the new expansion, the Court found this crossed that line and was unconstitutionally coercive.
- Having found the Medicaid coercion problem, the Court limited its fix to stopping the government from cutting off states' pre-existing Medicaid money over the expansion, while leaving the expansion itself available to any state willing to accept it and leaving the rest of the Act's more than 900 pages untouched.
Doctrinal impact
Cases affected by this decision
Distinguishes Wickard v. Filburn (317 U.S. 111)
Court says regulating a farmer's excess wheat production differs from forcing people into commerce who did nothing.
Distinguishes Gonzales v. Raich (545 U.S. 1)
Court says regulating existing marijuana cultivation differs from mandating that people enter a market.
Limits South Dakota v. Dole (483 U.S. 203)
Court applies Dole's coercion test but finds, for the first time, that a spending condition crossed the coercion line.
Reaffirms New York v. United States (505 U.S. 144)
Court relies on its rule that Congress cannot commandeer states into administering federal programs.
Reaffirms Printz v. United States (521 U.S. 898)
Court reaffirms that Congress cannot conscript state officials to carry out federal regulatory programs.