NFIB v. OSHA
The Supreme Court blocked OSHA's rule requiring about 84 million workers at large companies to get vaccinated against COVID-19 or submit to weekly testing, ruling the agency likely exceeded its legal authority.
The Court held that COVID-19 is a general public health hazard — not an occupational one — and that Congress never clearly gave OSHA power to issue such a sweeping nationwide health mandate, reinforcing limits on what federal agencies can do without explicit legislative approval.
How it got here: The Fifth Circuit initially stayed the rule; after consolidation, the Sixth Circuit dissolved that stay; states and businesses then applied to the Supreme Court for emergency relief, which the Court heard on an expedited basis.
The Case in Depth
What happened
Following President Biden's announcement of a plan to raise vaccination rates, OSHA issued an emergency rule requiring all employers with at least 100 employees to ensure their workers were either fully vaccinated against COVID-19 or tested weekly and wore masks. The rule covered roughly 84 million workers, pre-empted contrary state laws, and threatened employers with fines as high as $136,000 per willful violation. Dozens of states, businesses, trade groups, and nonprofits immediately challenged it.
The question before the Court
Could the federal workplace safety agency (OSHA) require employers with 100 or more workers to ensure every employee either gets vaccinated against COVID-19 or submits to weekly testing?
The Court's answer
No — the Court ruled that OSHA, the federal agency responsible for workplace safety, likely exceeded its legal authority by issuing this vaccine-or-testing requirement for 84 million workers.
The Court reasoned that OSHA is empowered to address hazards specific to the workplace — not broad public health threats that exist everywhere people gather. COVID-19 spreads at home, in schools, at sporting events, and in countless non-work settings, making it more like ordinary everyday risk than an occupational hazard. Because Congress never clearly granted OSHA the power to tackle a public health crisis of this magnitude and universality, and because the major questions doctrine — the rule requiring Congress to speak plainly before handing agencies authority over decisions of vast national consequence — was not satisfied, the mandate was stayed while the lower courts finish reviewing it.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Employers with 100 or more workers were immediately freed from the federal requirement to verify vaccination status, pay for weekly testing, or face hefty fines. The decision also signals that major policy decisions affecting tens of millions of Americans must come from Congress itself, not executive agencies — a limit that could constrain federal agency action across health, environment, and other domains.
What changes now
OSHA's vaccine-or-testing mandate is paused while challenges proceed in the Sixth Circuit. If the challengers later seek Supreme Court review and the Court agrees to hear the case on the full merits, the stay continues until the Court rules. If the petitions for full review are denied, the stay ends automatically. This order does not finally decide whether the mandate is lawful; it only halts its enforcement while that question is litigated.
What this does not decide
The Court explicitly reserved judgment on whether the mandate satisfied all the other legal requirements for an emergency temporary standard. It also did not foreclose OSHA from issuing narrower COVID-19 rules targeting workers in specific high-risk occupations or environments. The ruling addresses only the breadth of this particular mandate as a general public-health measure.
Concurrences and dissents
Concurrence — Justice Gorsuch
Justice Gorsuch wrote separately to emphasize the separation-of-powers stakes. He named the major questions doctrine explicitly and explained its relationship to the nondelegation doctrine — the constitutional rule against Congress handing its lawmaking power to unelected officials. He argued that if the statutory provision OSHA cited really did grant it sweeping authority over public health, that grant would itself be an unconstitutional delegation of legislative power to an agency. Either way, the mandate fails: it lacks clear congressional authorization, and interpreting the statute to provide that authorization would raise serious constitutional problems.
Dissent — Justice Breyer
“Today, we are not wise. In the face of a still-raging pandemic, this Court tells the agency charged with protecting worker safety that it may not do so in all the workplaces needed.”The dissent's pointed conclusion that the Court erred by displacing the expert agency's judgment during an ongoing public-health emergency.
The three dissenting justices argued that OSHA acted squarely within its statutory mandate. In their view, COVID-19 is plainly a grave workplace hazard — it spreads most readily in the shared indoor spaces where most Americans work, employees have little ability to avoid contact with colleagues, and OSHA's own expertise confirmed the danger. They contended that the majority invented a limitation not found in the statute's text, and that the balance of harms decisively favored letting the rule take effect: the stay would cost thousands of lives and hundreds of thousands of hospitalizations that OSHA projected it would prevent.
How the Court got there
The legal reasoning, step by step
- To win an emergency stay, the challengers had to show they were likely to succeed on the merits, that they would suffer irreparable harm if the rule took effect, and that the balance of harms and public interest favored pausing the rule while the case played out.
- OSHA's authorizing law (the Occupational Safety and Health Act) limits the agency to setting 'occupational safety and health standards' — rules about hazards tied to the workplace specifically. The emergency-standard provision lets the agency act quickly only when employees face 'grave danger' from substances or 'new hazards' inside the work setting.
- The major questions doctrine — the legal principle requiring Congress to speak clearly before authorizing an agency to take actions of vast economic and political significance — applied here. A rule commanding 84 million Americans to receive a vaccine or submit to weekly medical testing is precisely the kind of sweeping decision the doctrine requires Congress to authorize explicitly.
- COVID-19, while present in many workplaces, is not primarily an occupational hazard because it spreads everywhere — homes, schools, stores, public events — in the same way. The Court drew a key distinction: OSHA can regulate COVID-19 risks that are genuinely occupation-specific (such as researchers working directly with the virus or workers in extremely crowded conditions), but it cannot use a pandemic that affects all of society as the basis for a general public-health mandate.
- OSHA's 50-year history of never issuing a comparable broad public-health rule, combined with Congress's active decision not to authorize one even while passing major COVID-19 legislation, reinforced the conclusion that the agency lacked the power it was claiming.
- On the balance of harms, the Court acknowledged the government's estimate that the rule would save thousands of lives, but held it was not the Court's role to weigh those tradeoffs — that responsibility belongs to elected officials. Without clear congressional authorization, the mandate took on the character of a general public-health measure beyond OSHA's legal reach, so the stay was warranted.
Doctrinal impact
Cases affected by this decision
Reaffirms Alabama Assn. of Realtors v. Department of Health and Human Servs. (594 U. S. ___)
Reaffirms that Congress must speak clearly before delegating to an agency authority over decisions of vast economic and political significance.