The constitutional text

Article I · Section 8

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The Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States; but all Duties, Imposts and Excises shall be uniform throughout the United States;

To borrow Money on the credit of the United States;

To regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes;

To establish an uniform Rule of Naturalization, and uniform Laws on the subject of Bankruptcies throughout the United States;

To coin Money, regulate the Value thereof, and of foreign Coin, and fix the Standard of Weights and Measures;

To provide for the Punishment of counterfeiting the Securities and current Coin of the United States;

To establish Post Offices and post Roads; To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries;

To constitute Tribunals inferior to the supreme Court;

To define and punish Piracies and Felonies committed on the high Seas, and Offenses against the Law of Nations;

To declare War, grant Letters of Marque and Reprisal, and make Rules concerning Captures on Land and Water;

To raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years;

To provide and maintain a Navy;

To make Rules for the Government and Regulation of the land and naval Forces;

To provide for calling forth the Militia to execute the Laws of the Union, suppress Insurrections and repel Invasions;

To provide for organizing, arming, and disciplining, the Militia, and for governing such Part of them as may be employed in the Service of the United States, reserving to the States respectively, the Appointment of the Officers, and the Authority of training the Militia according to the discipline prescribed by Congress; To exercise exclusive Legislation in all Cases whatsoever, over such District (not exceeding ten Miles square) as may, by Cession of particular States, and the Acceptance of Congress, become the Seat of the Government of the United States, and to exercise like Authority over all Places purchased by the Consent of the Legislature of the State in which the Same shall be, for the Erection of Forts, Magazines, Arsenals, dock-Yards and other needful Buildings; -And

To make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by this Constitution in the Government of the United States, or in any Department or Officer thereof.

Source: National Constitution Center edition. Original wording is preserved; commentary explains historical and superseded provisions.

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Article I, Section 8, Clause 3b

Commerce among the states

Current text
and among the several States,

What it means

Congress receives authority to regulate commerce among the states. The word among directs attention to activity that crosses or concerns state boundaries, rather than automatically treating every local matter as national.

Historical setting

The Confederation struggled with state commercial rivalry and the absence of a general congressional commerce power. Federalist 42 presented regulation of interstate commerce as a means of securing harmony and workable exchange.

What it does

This clause became a major constitutional basis for national economic regulation. Questions about local activities connected to interstate markets require interpretation, often together with the Necessary and Proper Clause.

Debate & interpretation

The enduring dispute concerns how to distinguish a national market from matters properly left to state government. Broad connections can support coordination, but treating every indirect economic effect as sufficient risks dissolving the distinction between enumerated and general power.

A common misreading

The text does not say either that Congress can regulate absolutely everything affecting money or that commerce includes only goods physically crossing a border.

Think it through

How close should an activity’s connection to interstate exchange be before national regulation is justified?

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Sources & further reading

Original Madison Center commentary. Explanations distinguish the text, historical context, and interpretive disagreements.

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