When Is Federal Law Actually Supreme?

We hear the phrase all the time:

“Federal law is the supreme law of the land.”

But that is not actually what the Constitution says.

Article VI says:

“This Constitution, and the Laws of the United States which shall be made in Pursuance thereof…shall be the supreme Law of the Land.”

— U.S. Constitution, Article VI, Clause 2

Those three words “in Pursuance thereof” make all the difference.

The Constitution Comes First

The Supremacy Clause establishes an order.

First comes the Constitution.

Then come federal laws made in pursuance of that Constitution.

So Congress does not possess unlimited authority merely because it is Congress. A federal law becomes supreme within the constitutional system when Congress is exercising power that the people actually delegated to the federal government.

That is fundamentally different from saying:

Federal law always beats state law.

If that were true, there would be very little purpose in having a Constitution that enumerates and limits federal power.

Congress could simply legislate on anything it wished and then declare its own legislation supreme.

That would make Congress the supreme authority.

But the Constitution says the opposite.

The Constitution is supreme.

Federal Power Is Delegated Power

The federal government was created with particular powers for particular purposes.

James Madison famously described those federal powers as “few and defined,” while the powers remaining with the states were “numerous and indefinite.”

The Tenth Amendment reinforces the same rule:

“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.”

If a power has not been delegated to the federal government, the federal government cannot manufacture that authority simply by passing a statute.

So What Happens When Federal and State Law Conflict?

The first question should not be:

Which government passed the law?

The first question should be:

What power did the Constitution delegate?

If Congress is acting within a constitutionally delegated power, then a conflicting state law cannot override that valid federal exercise.

But if the federal government acts outside the authority delegated to it, calling its action “federal law” does not magically amend the Constitution.

Alexander Hamilton’s explains in Federalist No. 78: an act of delegated authority contrary to the commission from which that authority comes cannot be valid.

A government created by a Constitution cannot logically possess authority greater than the Constitution that created it.

This Is Why the States Matter

The states were never intended to function as fifty administrative districts of Washington, D.C.

They retained substantial authority of their own.

That is why disputes over federal supremacy cannot simply be reduced to:

“The federal government says it has the power, therefore it has the power.”

That reasoning allows the federal government to define the extent of its own authority.

And once government possesses the exclusive right to determine the limits of its own power, those limits cease to be meaningful.

So When Is Federal Law Supreme?

The answer is written directly into the Constitution:

When it is made in pursuance of the Constitution.

Not merely because Congress passed it.

Not merely because the President signed it.

Not merely because a federal agency issued a regulation.

And not merely because a federal court approved it.

The Constitution is the standard against which every exercise of federal power must be applied.

Federal law is supreme when the federal government is exercising authority actually delegated to it by the supreme law, the Constitution itself.