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 4a

A common rule for becoming a citizen

Current text
To establish an uniform Rule of Naturalization,

What it means

Congress may establish a uniform rule of naturalization, the process by which someone acquires citizenship through law after birth. This authority is different from determining every aspect of citizenship at birth.

Historical setting

Different state naturalization rules could affect the rights recognized across the Union. Federalist 42 explained why inconsistent rules were especially troublesome when states owed reciprocal recognition to one another’s citizens.

What it does

The power supports a national legal framework for naturalization. It does not mean that every constitutional right depends on citizenship or that Congress may disregard later constitutional citizenship guarantees.

Debate & interpretation

Naturalization rules express judgments about membership, allegiance, and inclusion. The challenge is to distinguish constitutional authority to set a process from the wisdom or justice of particular conditions imposed through that process.

A common misreading

The original naturalization clause does not by itself define every person who is a citizen at birth.

Think it through

Why might a federal union need a common naturalization rule even while states retain different rules on many other subjects?

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Sources & further reading

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

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