Modern Tenth Amendment Battles: Mask Mandates, Bathroom Bills, and Gun Sanctuary Laws

Last updated 6 days ago. Our resources are updated regularly but please keep in mind that links, programs, policies, and contact information do change.

The Tenth Amendment to the U.S. Constitution is the cornerstone of American federalism, the system of “dual sovereignty” that divides power between the national government and the states.

Its text is simple, but its application is profoundly complex and lies at the heart of the nation’s most contentious political debates.

It is a live conflict playing out in highly personal and politically charged arenas. From the public health measures of the COVID-19 pandemic to the civil rights of transgender individuals and the regulation of firearms, the Tenth Amendment is the constitutional battleground where questions about power, liberty, and governance are decided.

The Tenth Amendment Foundation

Understanding today’s policy battles requires a firm grasp of the legal framework established by the Tenth Amendment. Its history, the evolution of its interpretation by the courts, and the key legal doctrines it supports are essential for comprehending the conflicts over masks, bathrooms, and guns.

Text, History, and Original Intent

Ratified on December 15, 1791, as the final amendment in the Bill of Rights, the Tenth Amendment states: “The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.”

Its primary purpose was to reassure Anti-Federalists, who feared that the new Constitution created an overly powerful central government. The amendment reaffirmed the principle that the federal government possesses only limited and enumerated powers – those specifically granted to it in the Constitution.

It was intended as a rule for interpreting the Constitution, clarifying that any power not given to the federal government, and not denied to the states, remained with the states or the people themselves.

A pivotal moment in the amendment’s framing was the deliberate omission of a single word: “expressly.” The preceding Articles of Confederation had stated that each state retained every power not “expressly delegated” to the United States.

During the congressional debate over the Tenth Amendment, a proposal to re-insert the word “expressly” was defeated. James Madison, among others, argued against it, stating that “it was impossible to confine a Government to the exercise of express powers; there must necessarily be admitted powers by implication.”

This decision signaled a crucial difference from the Articles, acknowledging that the federal government would need implied powers to function effectively. This point would later become a cornerstone of Chief Justice John Marshall’s landmark opinion in McCulloch v. Maryland (1819), which upheld the doctrine of implied federal powers and rejected a Tenth Amendment challenge to the creation of a national bank.

The Judicial Pendulum: From “Truism” to Substantive Limit

The legal weight of the Tenth Amendment has swung back and forth over the course of American history, often reflecting the prevailing judicial philosophy of the Supreme Court. For much of the 20th century, particularly after the New Deal era began in the late 1930s, the Court viewed the amendment as little more than a “truism.”

In the case of United States v. Darby (1941), which upheld the federal Fair Labor Standards Act and overruled a prior decision that had struck down child labor laws on Tenth Amendment grounds, the Court unanimously declared that the amendment “states but a truism that all is retained which has not been surrendered.”

Under this interpretation, the amendment did not pose an independent barrier to federal action. If Congress had authority under one of its enumerated powers, such as the power to regulate interstate commerce, the Tenth Amendment could not be used to block it.

This view began to change in the 1970s with the rise of a “new federalism,” as a more conservative Court started to breathe new life into the Tenth Amendment as a judicially enforceable limit on federal power.

In National League of Cities v. Usery (1976), the Court struck down federal minimum wage laws as applied to state employees, finding that the Tenth Amendment protected states’ “freedom to structure integral operations in areas of traditional governmental functions.”

While National League of Cities was later overruled in Garcia v. San Antonio Metropolitan Transit Authority (1985), the tide had turned. By the 1990s, the Court had established durable precedents indicating that even when Congress acts within its constitutional authority, it cannot invade certain protected enclaves of state sovereignty.

This judicial pendulum swing reveals that the amendment’s legal force is not static; it expands and contracts based on the Supreme Court’s evolving perspective on the proper federal-state balance.

Core Doctrines of Modern Federalism

The modern debate over the Tenth Amendment revolves around a few key constitutional clauses and judicial doctrines that define the boundaries of federal and state power.

The Commerce Clause: Found in Article I, Section 8 of the Constitution, this clause gives Congress the power to regulate commerce “among the several States.” During the 20th century, it became the most frequently used basis for the expansion of federal power.

A broad interpretation, famously articulated in Wickard v. Filburn (1942), allowed Congress to regulate purely local activities (like a farmer growing wheat for his own use) if that activity, when aggregated across the country, could have a substantial effect on interstate commerce. The modern Court has placed new limits on this power.

The Supremacy Clause: Article VI, Section 2 establishes that the Constitution and validly enacted federal laws are “the supreme Law of the Land,” trumping conflicting state laws. This creates a clear hierarchy of law, but it only applies when the federal government is acting within its constitutional powers. A federal law that exceeds those powers is not supreme.

The Anti-Commandeering Doctrine: This is arguably the most potent modern legal doctrine derived from the Tenth Amendment. The Supreme Court has interpreted the amendment’s structural principle of dual sovereignty to mean that the federal government cannot “commandeer” the machinery of state government.

This doctrine has two primary components:

• Congress cannot compel states to enact or enforce a federal regulatory program. In New York v. United States (1992), the Court struck down a federal law that required states to either regulate radioactive waste according to federal standards or take title to the waste themselves. The Court held that Congress cannot force a state legislature to pass specific laws.
• Congress cannot force state executive officers to administer federal law. This principle was cemented in Printz v. United States (1997), which invalidated a provision of the Brady Handgun Violence Prevention Act that required local sheriffs to conduct background checks on gun purchasers. The Court ruled that Congress could not press state officers into federal service.

The power of the Tenth Amendment, therefore, is more structural than textual. Its simple sentence is the foundation for the complex anti-commandeering doctrine because courts view it as a constitutional shorthand for the entire architecture of federalism.

The rulings in New York and Printz are not based on a single word in the amendment but on the inference that compelling states to do the federal government’s bidding violates the fundamental division of power that the amendment symbolizes.

Public Health, Pandemics, and Mask Mandates

The COVID-19 pandemic threw the principles of federalism into sharp relief, creating a nationwide, real-time experiment in the division of power. The bitter disputes over mask mandates became a quintessential Tenth Amendment battle, pitting state authority against federal guidance and local control.

The States’ “Police Power”

Under the U.S. constitutional system, the authority to protect public health is a core component of the states’ reserved powers, often referred to as their “police power.” This is the inherent authority of a state government to regulate for the health, safety, welfare, and morals of its citizens.

The Constitution does not grant a general police power to the federal government. Consequently, states and their local governments are the primary actors in a public health emergency, responsible for implementing measures like quarantines, business closures, and mask requirements.

This principle was affirmed by the Supreme Court over a century ago in Jacobson v. Massachusetts (1905), which upheld a state’s authority to mandate smallpox vaccinations, establishing that individual liberty is not absolute and can be constrained by measures necessary for the “safety of the general public.”

Federal Authority vs. 10th Amendment Limitations

During the COVID-19 pandemic, the federal government’s powers were constitutionally limited. While the executive branch could issue guidance and recommendations, it lacked the direct authority to impose a universal, nationwide mask mandate on the general public.

The primary legal barrier was the Tenth Amendment’s anti-commandeering doctrine. As established in Printz v. United States, the federal government cannot compel state or local officials – such as police officers or public health departments – to enforce a federal directive. A federal law requiring states to enforce a mask mandate would have been a clear violation of this principle.

The federal government was therefore left with indirect tools:

The Spending Clause: Congress has the power to attach conditions to federal funds. It could have, for instance, offered states additional public health funding in exchange for enacting mask mandates. However, the Supreme Court has ruled this power has limits; the conditions cannot be so coercive that they essentially force a state’s hand, which would functionally commandeer it.

The Commerce Clause: The federal government’s authority to regulate interstate commerce allowed it to impose mask mandates in specific contexts. It did so for federal employees and on federal property, as well as in modes of interstate transportation like airplanes, trains, and buses, under the authority of agencies like the Transportation Security Administration (TSA).

These mandates were not without challenge. For example, a lawsuit filed by Lucas Wall and others argued that the federal transportation mask mandate exceeded agency authority and infringed on state domains and individual liberties. In April 2022, a federal district judge struck down the CDC’s public transit mask mandate, though the ruling focused on statutory authority rather than the Tenth Amendment.

The Federalism Patchwork in Action

The constitutional division of power resulted in a “patchwork quilt” of inconsistent and often conflicting policies across the country. As the pandemic evolved, states and localities adopted wildly different approaches to mask-wearing, creating a confusing and fragmented national response.

At various points, 39 states had some form of broad public mask mandate, while 11 never imposed one.

This dynamic also produced a phenomenon of “inverted federalism.” Many state leaders who championed states’ rights and invoked the Tenth Amendment to resist federal guidance then used centralized state power to preempt their own local governments.

Several states, including Texas, Florida, and Arizona, passed laws or issued executive orders that explicitly banned cities, counties, and local school districts from implementing their own mask mandates. This led to intense legal battles within states, where local officials in cities like Dallas and San Antonio sued their governors, arguing that the state-level bans interfered with their fundamental duty to protect public safety and violated home rule provisions in their state constitutions.

The invocation of federalism often appeared selective and strategic. The same principle of local control that was defended against the federal government was denied to cities and counties within the state’s own borders.

This suggests that for many, the debate was less about a consistent constitutional philosophy and more about achieving a specific policy outcome – in this case, preventing mask requirements. This “fair-weather federalism” highlights how political polarization can drive constitutional arguments, with the principle of federalism being used as a tool to advance a political agenda.

Ultimately, the pandemic exposed a core tension in the American system: a constitutional structure designed for policy diversity and the protection of state autonomy may be a liability in a national public health crisis that demands a coordinated, unified response.

Civil Rights, Gender Identity, and “Bathroom Bills”

The deeply personal and polarizing debate over transgender rights, particularly concerning access to sex-segregated facilities like restrooms and locker rooms, has become a major modern battleground for federalism. With the federal government and states often at odds, the Tenth Amendment’s reservation of power has created a fractured legal landscape defined by administrative actions, court battles, and a profound lack of national consensus.

State Power and the Policy Void

Congress has never passed a comprehensive federal law that explicitly prohibits discrimination based on gender identity in public accommodations. In the absence of such a law, the authority to regulate access to facilities like public restrooms largely falls to the states under the powers reserved to them by the Tenth Amendment.

This has led to a starkly divided nation. On one side, numerous states and localities have enacted non-discrimination laws that protect transgender individuals’ right to use facilities consistent with their gender identity.

On the other, a growing number of states have passed what are commonly known as “bathroom bills.” These laws restrict access based on a person’s sex assigned at birth. As of 2025, approximately half of the states have some form of ban, most commonly applying to K-12 public schools, but in several states, the restrictions extend to all government buildings, including colleges, courthouses, and public parks.

This legal patchwork means that a person’s right to access a public restroom can change simply by crossing a state line.

Title IX: The Federal Government’s Lever of Influence

The primary tool for federal intervention in this state-level debate has been Title IX of the Education Amendments of 1972. This landmark civil rights law prohibits discrimination “on the basis of sex” in any education program or activity that receives federal financial assistance.

The critical question became: does “on the basis of sex” include gender identity? The answer has changed dramatically with presidential administrations, creating a state of legal whiplash.

The Obama Administration: In 2016, the Departments of Justice and Education issued joint guidance declaring that Title IX does protect transgender students. The guidance directed schools to allow students to use restrooms and locker rooms consistent with their gender identity, asserting that this federal interpretation of Title IX superseded any conflicting state laws, such as North Carolina’s infamous HB2.

The Trump Administration: In 2017, the new administration promptly rescinded the Obama-era guidance. It later advanced the interpretation that Title IX’s protections are based on “biological sex” as assigned at birth, not gender identity. This policy shift led the Department of Education’s Office for Civil Rights to open investigations into school districts with trans-inclusive bathroom policies, finding them in violation of Title IX and threatening the loss of federal funding.

This struggle exemplifies “administrative federalism,” where the federal-state power balance is contested not through new laws from a gridlocked Congress, but through the shifting regulatory interpretations of the executive branch.

The Courts Enter the Fray: Bostock and the Circuit Split

The judiciary has become the key arbiter in this conflict. The landscape was reshaped by the Supreme Court’s 2020 decision in Bostock v. Clayton County. In that case, the Court held that under Title VII of the Civil Rights Act of 1964 (which governs employment), firing an employee for being gay or transgender is a form of discrimination “because of sex.”

However, in a crucial passage, the majority opinion explicitly stated it was not deciding issues related to “bathrooms, locker rooms, or anything else of the kind.”

This narrow ruling created a legal vacuum. It provided a powerful new argument for transgender rights advocates – that discrimination based on gender identity is sex discrimination – but it failed to provide a clear national answer for schools.

This forced the issue into the lower federal courts, which have since split on whether Bostock’s logic applies to Title IX and bathroom access, creating a deep circuit split.

Rulings Favoring Transgender Access: The U.S. Court of Appeals for the Fourth Circuit, in G.G. v. Gloucester County School Board, ruled that a school’s policy barring a transgender boy from the boys’ restroom violated both Title IX and the Equal Protection Clause. The court explicitly applied the “but for” reasoning from Bostock, concluding that the school could not deny access without referencing the student’s sex assigned at birth. The Seventh Circuit reached a similar conclusion.

Rulings Upholding Bathroom Bans: In contrast, the en banc Eleventh Circuit ruled in Adams v. St. Johns County School Board that separating bathrooms based on “biological sex” does not violate Title IX. The court distinguished Title IX from Title VII, noting that Title IX’s regulations explicitly permit schools to maintain separate facilities “for the different sexes.”

The Ninth Circuit, in Roe v. Critchfield, later agreed, finding that Idaho’s bathroom bill was not discriminatory because protecting student privacy was an important government objective and that the state was not on “clear notice” from Title IX that its policy was prohibited.

This judicial divide ensures that the battle over bathroom bills will continue to be fought state by state and circuit by circuit, a direct consequence of the Tenth Amendment’s reservation of unenumerated powers and the Supreme Court’s decision to leave the specific question unanswered.

Firearm Regulation and the Second Amendment

No issue illustrates the friction between federal power and states’ rights more starkly or consistently than the regulation of firearms. For decades, the Tenth Amendment has been the legal foundation for challenges to federal gun laws, culminating in landmark Supreme Court decisions that have reshaped the balance of power and empowered a modern movement of state and local resistance.

The Federal Regulatory Framework

The federal government’s authority to regulate firearms is primarily based on a handful of major laws enacted over the past century. These statutes create the federal backdrop against which state-level resistance occurs.

The Supreme Court Draws a Line: Limiting Federal Reach

In the 1990s, the Supreme Court issued two landmark rulings that used the principles of the Tenth Amendment to place significant constraints on federal power to regulate firearms.

United States v. Lopez (1995): In this case, the Court struck down the federal Gun-Free School Zones Act of 1990. The government argued the law was a valid exercise of its power under the Commerce Clause, but the Court disagreed.

It ruled that possessing a gun in a local school zone was a non-economic, criminal activity that did not have a substantial effect on interstate commerce. The decision was a major victory for federalism, as the Court explicitly stated that upholding the law would “convert congressional authority under the Commerce Clause to a general police power of the sort retained by the States,” which the Tenth Amendment forbids.

Printz v. United States (1997): This case represents the apex of the Tenth Amendment’s application to gun control. The Court examined the Brady Act’s interim provision that required local chief law enforcement officers (CLEOs) to perform background checks on gun buyers. In a 5-4 decision authored by Justice Antonin Scalia, the Court held this provision unconstitutional.

The ruling was a direct application of the anti-commandeering doctrine. Justice Scalia wrote, “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.”

Forcing local sheriffs to execute federal law, the Court concluded, was a violation of the “structural framework of dual sovereignty” that the Tenth Amendment protects.

Modern Resistance: “Second Amendment Sanctuaries”

The legal principles articulated in Lopez and Printz have directly empowered a modern, grassroots political movement: “Second Amendment Sanctuaries.” These are states, counties, and municipalities that have passed resolutions or laws declaring their opposition to certain federal or state gun-control measures they deem unconstitutional, such as bans on certain types of firearms or “red flag” laws.

The movement explicitly draws its name and strategy from the “sanctuary city” movement for immigrants. While the political goals are opposite, the underlying constitutional logic is identical.

These jurisdictions are not attempting to “nullify” federal law, an action that is unconstitutional under the Supremacy Clause and has been struck down by federal courts when tried, as was the case with Missouri’s Second Amendment Preservation Act.

Instead, they are leveraging the anti-commandeering doctrine from Printz. Their resolutions typically state that no local or state funds, resources, or personnel will be used to assist in the enforcement of the targeted federal gun laws.

This is the modern embodiment of the Printz ruling in action. The Supreme Court established the legal principle that the federal government cannot force state officers to carry out its programs, and sanctuary jurisdictions are translating that principle into local law and policy.

States like Texas, Tennessee, and West Virginia have passed statewide sanctuary laws that prohibit state agencies from cooperating with the enforcement of any new federal gun restrictions, demonstrating a direct line from a high-level constitutional decision to on-the-ground political resistance.

The parallel rise of Second Amendment sanctuaries on the political right and immigration sanctuaries on the political left powerfully illustrates that federalism is an ideologically neutral tool, available to any group seeking to resist federal authority by asserting the division of power enshrined in the Tenth Amendment.

The Continuing Battle

These three case studies – mask mandates, bathroom bills, and gun sanctuary laws – demonstrate how the Tenth Amendment remains a vital and contested part of American governance. The amendment’s simple language continues to generate complex legal and political battles because it addresses one of the most fundamental questions in any democracy: who decides?

The COVID-19 pandemic showed how federalism can complicate national responses to urgent crises. The transgender rights debate reveals how federal administrative interpretations can shift dramatically with changing political winds. The gun sanctuary movement demonstrates how constitutional principles established in Supreme Court cases can inspire grassroots political resistance.

In each case, the Tenth Amendment serves as both a shield and a sword – protecting state authority from federal overreach while also enabling political movements to resist policies they oppose. The amendment’s flexibility means it can be invoked by liberals resisting conservative federal policies and conservatives resisting liberal federal policies.

This ideological neutrality is perhaps the amendment’s greatest strength and its greatest challenge. It provides a constitutional framework for resolving disputes about the proper balance of power, but it doesn’t provide easy answers. Instead, it ensures that the debate over federalism will continue as long as Americans disagree about the proper role of government at different levels.

The battles over masks, bathrooms, and guns are not merely policy disputes – they are constitutional conflicts that reveal deep disagreements about fundamental questions of governance, rights, and democracy. The Tenth Amendment provides the legal framework for these battles, but it cannot resolve the underlying political and moral disagreements that drive them.

As America continues to grapple with these issues, the Tenth Amendment will remain a crucial battlefield where competing visions of federalism, rights, and government power are contested. The amendment’s 27 words will continue to generate thousands of pages of legal opinions, legislative debates, and political arguments as Americans work to define the proper balance between federal authority and state sovereignty in the 21st century.

Our articles make government information more accessible. Please consult a qualified professional for financial, legal, or health advice specific to your circumstances.