MADISONCENTER FOR AMERICAN LEADERSHIP
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The Constitution,
connected.

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Discover the ideas that hold a republic together.

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The constitutional text

Article I · Section 8

Select any highlighted phrase to understand what it means.

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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202 elements · 219 connections · One constitutional systemOpen the reader
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You don’t have to understand everything at once. One connection is a good beginning.

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Article I, Section 8, Clause 5b

Common weights and measures

Current text
and fix the Standard of Weights and Measures;

What it means

Congress may fix standards of weights and measures. This is authority to establish consistent units for quantities, making measurements intelligible across the country.

Historical setting

The Articles included a similar national power. A common standard was useful in a union where buyers, sellers, and governments needed to understand each other’s prices and obligations.

What it does

The clause supports reliable commerce without itself requiring every transaction to use one specified measurement system. Standards and the rules requiring or permitting their use are related but separate policy choices.

Debate & interpretation

A modest-looking technical power can have substantial civic importance because trustworthy exchange depends on shared meanings. The policy debate concerns which standards facilitate coordination and how much compulsory uniformity is necessary.

A common misreading

The Constitution does not choose inches rather than meters or constitutionally freeze eighteenth-century instruments of measurement.

Think it through

How could incompatible definitions of a pound or gallon undermine trade even if tariffs between states disappeared?

Follow the connection

Sources & further reading

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

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