Who Defines Insurrection?

 

ABOVE: “The Peacemakers” (1868) by George Peter Alexander Healy, depicting a Union military strategy meeting in 1865. From left to right: Major General William Tecumseh Sherman; U.S. Army Commanding General Ulysses S. Grant; President Abraham Lincoln; and Rear Admiral David Dixon Porter (The White House Historical Association)

America’s Constitution is not a manifesto. It is a structure. Like all enduring structures, it was built not only for fair weather but for storms. The men who framed the schematics had lived through rebellion, occupation, and civil war. They knew that a republic without a final authority is not a republic at all, but a temporary truce among factions. For this reason, they designed a political framework that tolerates dissent, sanctifies local life, and yet reserves, in the last instance, a national power capable of preserving the whole.

That ultimate power is rarely mentioned in political speeches. It is not the Supreme Court, nor Congress, nor even the presidency in its ordinary administrative role. This power is something older, sterner, and more elemental: the authority of the United States to execute its own laws when persuasion, litigation, and politics have failed. In American law, that authority is known as the Insurrection Act.

In recent years, the Act has returned from constitutional obscurity into political controversy. This debate is not unfolding in the political ether. It began with Operation Metro Surge, a large federal immigration enforcement operation led by Immigration and Customs Enforcement (ICE) and the Department of Homeland Security (DHS) that focused on identifying, arresting, and removing individuals unlawfully in the United States. Federal officials have described this as one of the largest immigration enforcement operations ever undertaken, involving thousands of federal agents and thousands of arrests. The president has a constitutional duty to “take Care that the Laws be faithfully executed,” which necessarily includes enforcing federal immigration law nationwide regardless of local political disagreement. ICE, DHS, and the Department of Justice are all empowered by Congress to carry out that responsibility.

This federal immigration law enforcement in Minnesota has met intense opposition in the form of mass protests, episodes of violence, political unrest, disruption of church services by agitators, and sharp resistance from some state and local officials. 

This is why discussion of the Insurrection Act has emerged with such urgency. We are no longer discussing a theoretical statute from a distant constitutional past; we are confronting a live dispute over federal supremacy, state resistance, and the president’s obligation to ensure that federal law can be executed safely and effectively on American soil.

President Trump has warned he would invoke the Insurrection Act to “quickly put an end to the travesty that is taking place” if the “corrupt politicians of Minnesota don’t obey the law and stop the professional agitators and insurrectionists from attacking the Patriots of ICE.”

State leaders have responded in starkly different terms. Governor Tim Walz has encouraged Minnesotans to “resist” the federal immigration law enforcement and denounced it as an attack on his state by the federal government. Minneapolis Mayor Jacob Frey has gone further, telling federal law enforcement to leave the city altogether and bluntly telling ICE to get the “f[***] out of Minneapolis,” while insisting that the federal government is responsible for escalating tensions.

Some speak of the Insurrection Act as an expression of tyranny, others as a relic of a more martial age. But neither camp has reckoned seriously with what the Act actually is: not a loophole for despotism, but a keystone of the constitutional order. The statute that reveals, more clearly than any other, what the Union ultimately is: a government that can be argued with, sued, voted against, and protested—but not physically nullified.

The American system is often described as a delicate balance of powers. That description is true as far as it goes, but it misses something essential. Balance alone cannot sustain a political order. There must also be a principle of resolution with some authority that decides, finally and practically, whose law governs a given piece of ground.

That question ceases to be hypothetical when federal officers face organized resistance while attempting to execute immigration law in major American cities.

The founders understood the tension between federal and state law with an intimacy born of failure. The Articles of Confederation had created a nation that could speak but not act, command but not compel. The result was not liberty, but impotence. Shay’s Rebellion was not merely a rural uprising in Massachusetts, but a warning to the entire continent that a government unable to enforce its own laws would soon cease to be a government at all.

The Constitution was the answer. It created a federal system in which states retained their dignity and their spheres of authority, while the national government possessed supremacy in its own domain. “The laws of the United States … shall be the supreme Law of the Land,” the document declares, not as poetry but as architecture. The clause is not about prestige but motion. Federal law must be able to move through courts, through officers, and through territory without being stopped at a state line or a governor’s desk.

This is where the Insurrection Act enters the story. It is the statute that operationalizes the Supremacy Clause when other options have failed.

Modern Americans are accustomed to think of the president as a manager of agencies and a signer of bills. The Constitution, however, assigns him a more ancient role. He is not only the head of the executive branch. He is the chief magistrate of the republic and the commander in chief of its forces.

In the constitutional vocabulary of the founding era, the term “chief magistrate” carried far more weight than modern administrative language suggests. It drew from English constitutional practice, classical republican theory, and colonial governance, in which the magistrate was understood as the guardian of public order and the officer charged with seeing that the law actually functioned in reality. Blackstone described magistracy as the power entrusted with maintaining the peace, executing judgments, and preserving the stability of civil society. These are functions the framers deliberately concentrated in a single executive, to avoid the paralysis that had plagued government under the Articles of Confederation. The American president was thus viewed not merely as a bureaucratic supervisor but as the living instrument through which the law acquires operational force.

The title “commander in chief” likewise reflects an inheritance older than the Constitution itself. In British practice, the Crown held unified military command precisely to ensure that force remained subordinate to civil authority. But the Crown was capable of decisive action when the nation faced rebellion, invasion, or breakdown of order. The framers retained that principle even while abolishing monarchy. They vested military command in an elected executive who would remain accountable to law and legislature but would be able to act with unity, speed, and clarity in moments of crisis. As Hamilton explained in Federalist 70, energy in the executive was not a luxury but a safeguard of liberty, because a government incapable of enforcing its laws invites either anarchy or extra-constitutional remedies.

Taken together, these roles mean that the presidency was designed as both the republic’s chief civil officer and its ultimate guarantor of constitutional order; the office that ensures law is not merely declared, but sustained, defended, and, when necessary, enforced against organized resistance.

The president’s duty to “take Care that the Laws be faithfully executed” is not an exhortation to oversee bureaucrats. The clause is a charge to ensure that federal law is not merely written and interpreted, but actually carried out in the real world. When federal officers are prevented from serving warrants, transporting detainees, securing facilities, or executing court orders, that failure is not just procedural. It is constitutional.

Congress cannot, by statute, strip the president of this core authority. The Posse Comitatus Act, often invoked as a restraint, explicitly yields to constitutional power and does not limit the president’s own Article II authorities. Enacted in 1878 in the aftermath of Reconstruction, Posse Comitatus was principally intended to prevent U.S. marshals and other civilian officials from commandeering federal troops for routine domestic law enforcement, rather than to eliminate presidential constitutional authority to use military force when authorized by the Constitution or Congress. The Insurrection Act, far from creating new presidential authority, recognizes and channels it, providing a legal pathway for exercising a power that already exists in the Constitution. 

The contemporary dispute in Minnesota centers precisely on whether federal immigration law can be executed safely and consistently amid violence incited by local leaders. This is why the Act vests judgment in the president’s hands. It authorizes him to act when “unlawful obstructions, combinations, or assemblages” make it “impracticable” to enforce federal law through the ordinary course of judicial proceedings. The language is not judicial, but executive. It assumes a man in office who must decide, in real time, whether the republic’s laws can still be enforced.

The Insurrection Act is not a modern invention. Its lineage runs back to the earliest years of the republic, when President Washington marched militia forces to suppress the Whiskey Rebellion. That episode, now reduced to a paragraph in textbooks, was a constitutional challenge of the first order. It established, in practice rather than in theory, that the federal government would not tolerate armed resistance to its laws. That authority came from the original Militia Act of 1792, often called the Calling Forth Act, which empowered the president to summon state militias to enforce federal law. Congress later expanded that authority in 1807, under President Jefferson, allowing the direct use of federal troops, and from that emerged the modern Insurrection Act.

It is the Whiskey Rebellion and its protest against a particular federal law—an excise tax on liquor—that may best resemble today’s violence directed at America’s immigration laws. 

Later generations would invoke the same principle for different causes. Abraham Lincoln relied on the underlying authority to preserve the Union itself. Dwight Eisenhower sent federal troops to Little Rock to enforce desegregation orders when state officials defied the Supreme Court. In 1992, President Bush invoked the Act to restore order amid the riots of Los Angeles. 

Each episode was a response to a crisis in which federal authority confronted organized resistance. This can easily be discerned in the standoff between federal immigration enforcement and organized protest activity in Minnesota.

Federalism lets states say “no thanks” to Washington—not “you shall not pass.” The anti-commandeering doctrine of the 10th Amendment prohibits Washington from forcing states to administer federal programs. That means a state governor may, under most circumstances, lawfully refuse to assist federal immigration enforcement. And a state legislature may prohibit the federal government’s use of state resources. This is lawful noncooperation, rooted in the dual sovereignty of state governments.

But this sovereignty does not include a veto over federal action. The Supremacy Clause draws a bright line between noncooperation and obstruction. The former is silence. The latter is force.

A state that declines to use its own resources to help federal officers remains within its rights. A state that deploys its police or National Guard to block federal officers from executing valid federal processes crosses into constitutional defiance. At that moment, the issue is no longer federalism. It is active insurrection.

This distinction is not academic. It is the hinge on which the Insurrection Act turns. The statute does not exist to punish disagreement. It exists to respond to organized resistance that makes the ordinary operation of law impossible or unsafe. Whether current events in Minnesota cross that threshold is now a matter of national political consequence.

Today, there are organized bands of resistance with no direct ties to any government that seek to obstruct and undermine the enforcement of federal laws. The Insurrection Act (and its predecessors) has been used time and time again by presidents back to our founding to address exactly such situations.

In defiance of federal immigration law, Democrats have revived the rhetoric of nullification. Every generation finds new words for old temptations. Today, the language of “sovereignty” and “invasion” circulates through blue-state capitols and press rooms. It carries the echo of an earlier era, when South Carolina declared federal tariffs “null and void” in 1832 and claimed the right to interpose its authority against the Union.

The Supreme Court’s answer, then and now, has been unwavering. States may argue. They may protest. They may sue. They may seek to change the law through elections and amendments. They may not physically stop the federal government from enforcing its own laws.

James Madison, so often miscast as a patron of nullification, rejected the doctrine in his later years with unmistakable clarity. Interposition, he wrote, was a political act, not a legal power. It meant persuasion, not suspension. To allow a single state to prevent the execution of federal law would be to dissolve the Union into a collection of armed camps.

This Madisonian logic carries into the present. A state that claims the right to block federal immigration enforcement on constitutional grounds is not engaging in interposition. It is undertaking nullification in operational form. The Constitution rejects the existence of such a power. 

It is important to be candid about political rhetoric across administrations. During the Biden years, many conservatives described the unprecedented surge of unlawful border crossings as an “invasion.” That language rightfully drew on constitutional text in Article I’s Compact Clause, which allows states to act in self-defense when actually invaded, and Article IV’s Guarantee Clause obligates the federal government to protect states against invasion. The argument rested on the premise of large-scale unlawful entry across an international boundary by noncitizens, which is how the founders themselves understood the danger of invasion.

But that argument contains its own limiting principle. An invasion, in the constitutional sense, presupposes an external force entering the United States without sovereign authorization. It does not encompass the lawful actions of federal officers executing federal law within a state. Whatever one thinks of particular immigration policies, federal agents operating under statutory authority are not foreign belligerents, nor the constitutional equivalent of an invading army.

That distinction matters enormously in the present debate over immigration enforcement in Minnesota and elsewhere. Some critics have begun describing federal immigration operations in the Twin Cities as an “invasion” by Washington. This is a glaring misconception. Federal law enforcement activity inside the United States, even when controversial, aggressive, or politically contested, remains an exercise of national sovereignty, not an assault upon lawful rule. Calling it an invasion implicitly asserts a state power to resist federal law by force, a claim the Constitution decisively rejects.

Indeed, the very existence of the Insurrection Act reflects this constitutional settlement. The statute presupposes that states do not possess a lawful right to treat federal enforcement of the law as a hostile occupation. When organized resistance obstructs federal authority, the constitutional response is not state counterforce but federal supremacy, enforced if necessary through national power. The Act is not a war power against the states; it is the legal mechanism that prevents domestic political disputes from escalating into something resembling civil war.

This does not mean federal enforcement is beyond criticism. It does mean that constitutional vocabulary must remain tethered to constitutional reality. Conservatives who used the language of invasion at the southern border were lawfully and constitutionally pointing to external entry across the nation’s boundary. Applying that same label to federal officers carrying out federal statutes within Minnesota transforms a policy disagreement into a constitutional contradiction.

The Supremacy Clause ensures that federal law governs where it constitutionally applies, and the Insurrection Act stands as the statutory affirmation that organized obstruction cannot override that principle.

The Constitution does not rush to the use of military power. It prefers courts to commands, injunctions to interventions.

The first steps for the executive are legal: record-building, declaratory judgments, supremacy-based injunctions, and the removal of state prosecutions into federal courts. These measures aim to keep conflict within the realm of law.

But the ladder does not end there. If state officials or organized groups physically obstruct federal officers—if they threaten, detain, or blockade—the law provides criminal remedies. Assaulting or obstructing a federal officer is not a political statement—it’s a federal crime.

If the obstruction is carried out through the National Guard under state command, the Constitution provides a further remedy: federalization. Title 10 allows the president to place the Guard under federal control to ensure that it cannot be used as an instrument of resistance.

Only when these measures fail, when the “ordinary course of judicial proceedings” has become impracticable, does the Insurrection Act stand fully revealed. It is not the first resort of a free government. But it can be legally used by the president as he “considers necessary” whenever the statutory criteria are met. 

The statute’s most controversial feature is also its most revealing: it entrusts the determination of necessity to the president. Critics may argue that courts should second-guess the decision to invoke the Act. The statute itself says otherwise. It frames the judgment as an executive assessment of conditions on the ground. If litigation arises from a potential federal action in Minnesota, courts will likely confront the question of how much respect is owed to federal law. But we know from the Constitution which branch is responsible for those determinations. 

The Founders placed the responsibility for national security and the execution of law in a single office because they knew that delay, division, and diffusion of authority could be fatal in moments of crisis. That does not make the president a king. It makes him accountable. Every invocation of the Act carries political risk, historical judgment, and moral weight. But the absence of such a power would carry a greater risk still: the transformation of constitutional conflict into territorial contest with quasi-sovereign states vying for power.

There is a temptation, especially among conservatives, to view any assertion of national power with suspicion. That instinct is healthy. It has preserved space for local traditions and customs, and for state governance.

But conservatism, at its best, does not encourage fragmentation. It is a philosophy of order. Edmund Burke defended tradition because it was durable. The American Constitution is one such tradition. It is a layered inheritance, combining local loyalty with national authority, the hallmark of federalism.

The Insurrection Act, paradoxically, is part of that inheritance. It is the statute that ensures the republic does not become a federation of state vetoes. It preserves the possibility of law in a world of unlawful impossibilities.

The Insurrection Act endures because it answers a question no republic can escape: What happens when law meets force?

The American answer is neither anarchy nor autocracy. It is authority under law. The Act does not suspend the Constitution. It enforces it. You do not have to be a legal constitutional engineer to understand how it is built.

In a nation as vast and various as the United States, there will always be disagreements sharp enough to tempt defiance. The genius of the architects of the constitutional order is that it channels those disagreements into forms that preserve the whole. When those channels are blocked, the republic falls back on its deepest reserve.

That reserve is not a committee or a court. It is the sovereign power of the Union, vested in an office designed to act when others cannot.

This is not a comfortable truth. But it is a conservative one. And it is one the founders themselves sought to bring about by evolving America from the Articles of Confederation to the Constitution—none more than George Washington himself.

The founders’ concern about national impotence remains strikingly relevant as modern federal enforcement operations could encounter organized resistance within the states.

For a people who inherit their institutions rather than invent them anew, the question is not whether such power can be misused. Any power can. The question is whether a nation can endure without it.

The Insurrection Act stands as the Constitution’s unsentimental answer. Whether or not it is ultimately invoked in Minnesota or elsewhere, the conflict there illustrates why the statute exists, and why the constitutional architecture behind it remains very much alive.

By Ken Cuccinelli and Benjamin Osborne at chroniclesmagazine.org, March 2026