Sixteenth. To exercise exclusive legislation in all cases whatever over such district (not exceeding 10 miles square) as may, by the cession of particular States and the acceptance of by Congress, become the seat of 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 may be, for the erection of forts, magazines, arsenals, dockyards, and other needful buildings;
Seventeenth. 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.
To the other branches of the Government the powers properly belonging to each are granted. The President, in whom the executive power is vested, is made commander in chief of the Army and Navy, and militia when called into the service of the United States. He is authorized, with the advice and consent of the Senate, two-thirds of the members present concurring, to form treaties, to nominate and, with the advice and consent of the Senate, to appoint ambassadors, other public ministers, and consuls, judges of the Supreme Court, and all other officers whose appointments are not otherwise provided for by law. He has power to grant reprieves and pardons for offenses against the United States, except in cases of impeachment. It is made his duty to give to Congress from time to time information of the state of the Union, to recommend to their consideration such measures as he may judge necessary and expedient, to convene both Houses on extraordinary occasions, to receive ambassadors, and to take care that the laws be faithfully executed.
The judicial power is vested in one Supreme Court and in such inferior courts as Congress may establish; and it is made to extend to all cases in law and equity arising under the Constitution, the laws of the United States, and treaties made under their authority. Cases affecting ambassadors and other public characters, cases of admiralty and maritime jurisdiction, causes in which the United States are a party, between two or more States, between citizens of different States, between citizens of the same State claiming grants of land under different States, between a State or the citizens thereof and foreign States, are specially assigned to these tribunals.
Other powers have been granted in other parts of the Constitution which, although they relate to specific objects, unconnected with the ordinary administration, yet, as they form important features in the Government and may shed useful light on the construction which ought to be given to the powers above enumerated, it is proper to bring into view.
By Article I, section 9, clause 1, it is provided that the migration or importation of such persons as any of the States now existing shall think proper to admit shall not be prohibited by Congress prior to the year 1808, but a tax or duty may be imposed on such importation not exceeding $10 for each person.
By Article III, section 3, clause 1, new States may be admitted by Congress into the Union, but that no new State shall be formed within the jurisdiction of another State, nor any State be formed by the junction of two or more States or parts of States without the consent of the legislature of the States concerned as well as of the United States. And by the next clause of the same article and section power is vested in Congress to dispose of and make all needful rules and regulations respecting the territory or other property belonging to the United. States, with a proviso that nothing in the Constitution shall be so construed as to prejudice any claims of the United States or of any particular State.
By Article IV, section 4, the United States guarantee to every State a republican form of government and engage to protect each of them against invasion; and on application of the legislature, or of the executive when the legislature can not be convened, against domestic violence.
Of the other parts of the Constitution relating to power, some form restraints on the exercise of the powers granted to Congress and others on the exercise of the powers remaining to the States. The object in both instances is to draw more completely the line between the two governments and also to prevent abuses by either. Other parts operate like conventional stipulations between the States, abolishing between them all distinctions applicable to foreign powers and securing to the inhabitants of each State all the rights and immunities of citizens in the several States.
By the fifth article it is provided that Congress, whenever two-thirds of both Houses shall deem it necessary, shall propose amendments, or, on the application of the legislatures of two-thirds of the several States, shall call a convention for proposing amendments, which in either case shall be valid as a part of the Constitution when ratified by the legislatures of three-fourths of the several States, or by conventions in three-fourths thereof, as the one or the other mode may be proposed by Congress: Provided, That no State, without its consent, shall be deprived of its equal vote in the Senate, and that no amendment which may be made prior to the year 1808 shall affect the first and fourth clauses in the ninth section of the first article.