Concept thread · Economy
the commerce power
The federal power to regulate commerce with foreign nations, among the several States, and with the Indian tribes — construed broadly as plenary over its objects (including navigation) against the claim of a reserved concurrent power in the States.
Emerges 1787 → codified 1824 — a 37-year arc from first appearance to codification.
The thread
- 1787 · enactsThe clause vests in Congress an affirmative power to regulate trade among the states and with foreign nations, opening the commerce-power thread.
- 1787 · grievesupheldMason objects that commercial and navigation laws passed by a bare majority let the eight northern states set terms that could ruin the five southern ones — he wanted a two-thirds requirement.⚖ Mason isn't disputing that Congress will hold this power or how far it reaches — he takes it for granted that "Navigation Laws" are commercial laws. His complaint is with the voting rule: a bare "Majority" would let the eight northern states ruin the five southern ones, whereas "requiring two thirds of the Members present in both Houses wou'd have produced mutual moderation." So the passage is a complaint about how the commerce power will be wielded, not a challenge to its scope — and Mason's easy assumption that navigation counts as commerce quietly supports the broad reading of "commerce" that this thread traces.
- 1824 · interpretsupheldMarshall construes the constitutional commerce clause as a plenary power that may be exercised to its utmost extent, bounded only by limitations the constitution itself prescribes.⚖ Marshall is doing the work of a judge construing a clause, not merely proclaiming a slogan: he first defines the grant — "It is the power to regulate; that is, to prescribe the rule by which commerce is to be governed" — and only then concludes it "is complete in itself, may be exercised to its utmost extent, and acknowledges no limitations, other than are prescribed in the constitution." The next sentence reasons from a premise ("If, as has always been understood, the sovereignty of Congress... is plenary as to those objects"), which is interpretation, not self-evident assertion. One small caveat for the reader: the word "plenary" in the gloss is borrowed from that following sentence about Congress's sovereignty over its objects — the quoted sentence itself says the power is "complete."
- 1824 · interpretsupheldThe Court settles the meaning of the word commerce to include navigation, so that regulating vessels falls squarely within the granted power.⚖ Here Chief Justice Marshall is doing the work of a court reading the Constitution: he says that "to ascertain the extent of the power, it becomes necessary to settle the meaning of the word" commerce, and then concludes it "comprehends, and has been always understood to comprehend, navigation within its meaning." It is true he is pushing back on the other side's narrower reading ("the counsel for the appellee would limit it to traffic, to buying and selling"), but knocking down a rival reading is just part of how a court pins down what a clause means — so the link is correctly typed as the Court interpreting the commerce power, not merely arguing a side.
Related threads
Threads argued alongside this one, or that answer it.
A thread read top to bottom is the spine of a paper: trigger → grievance → rebuttal → remedy → interpretation. See it in time on the timeline, or browse all concepts.