There is nothing in the context which qualifies the grant of power. The regulations must be "respecting the territory." An enactment that slavery may or may not exist there, is a regulation respecting the territory. Regulations must be needful; but it is necessarily left to the legislative discretion to determine whether a law be needful. No other clause of the Constitution has been referred to at the bar, or has been seen by me, which imposes any restriction or makes any exception concerning the power of Congress to allow or prohibit slavery in the territory belonging to the United States.
A practical construction, nearly contemporaneous with the adoption of the Constitution, and continued by repeated instances through a long series of years, may always influence, and in doubtful cases should determine, the judicial mind, on a question of the interpretation of the Constitution. (Stuart v. Laird, 1 Cranch, 269; Martin v. Hunter, 1 Wheat., 304; Cohens v. Virginia, 6 Wheat., 264; Prigg v. Pennsylvania, 16 Pet., 621; Cooley v. Port Wardens, 12 How., 315.)
In this view, I proceed briefly to examine the practical construction placed on the clause now in question, so far as it respects the inclusion therein of power to permit or prohibit slavery in the Territories.
It has already been stated, that after the Government of the United States was organized under the Constitution, the temporary Government of the Territory northwest of the river Ohio could no longer exist, save under the powers conferred on Congress by the Constitution. Whatever legislative, judicial, or executive authority should be exercised therein could be derived only from the people of the United States under the Constitution. And, accordingly, an act was passed on the 7th day of August, 1789, (1 Stat. at Large, 50,) which recites: "Whereas, in order that the ordinance of the United States in Congress assembled, for the government of the territory northwest of the river Ohio, may continue to have full effect, it is required that certain provisions should be made, so as to adapt the same to the present Constitution of the United States." It then provides for the appointment by the President of all officers, who, by force of the ordinance, were to have been appointed by the Congress of the Confederation, and their commission in the manner required by the Constitution; and empowers the Secretary of the Territory to exercise the powers of the Governor in case of the death or necessary absence of the latter.
Here is an explicit declaration of the will of the first Congress, of which fourteen members, including Mr. Madison, had been members of the Convention which framed the Constitution, that the ordinance, one article of which prohibited slavery, "should continue to have full effect." Gen. Washington, who signed this bill, as President, was the President of that Convention.
It does not appear to me to be important, in this connection, that that clause in the ordinance which prohibited slavery was one of a series of articles of what is therein termed a compact. The Congress of the Confederation had no power to make such a compact, nor to act at all on the subject; and after what had been so recently said by Mr. Madison on this subject, in the thirty-eighth number of the Federalist, I cannot suppose that he, or any others who voted for this bill, attributed any intrinsic effect to what was denominated in the ordinance a compact between "the original States and the people and States in the new territory;" there being no new States then in existence in the territory, with whom a compact could be made, and the few scattered inhabitants, unorganized into a political body, not being capable of becoming a party to a treaty, even if the Congress of the Confederation had had power to make one touching the government of that territory.
I consider the passage of this law to have been an assertion by the first Congress of the power of the United States to prohibit slavery within this part of the territory of the United States; for it clearly shows that slavery was thereafter to be prohibited there, and it could be prohibited only by an exertion of the power of the United States, under the Constitution; no other power being capable of operating within that territory after the Constitution took effect.
On the 2d of April, 1790, (1 Stat. at Large, 106,) the first Congress passed an act accepting a deed of cession by North Carolina of that territory afterwards erected into the State of Tennessee. The fourth express condition contained in this deed of cession, after providing that the inhabitants of the Territory shall be temporarily governed in the same manner as those beyond the Ohio, is followed by these words: "Provided, always, that no regulations made or to be made by Congress shall tend to emancipate slaves."
This provision shows that it was then understood Congress might make a regulation prohibiting slavery, and that Congress might also allow it to continue to exist in the Territory; and accordingly, when, a few days later, Congress passed the act of May 20th, 1790, (1 Stat. at Large, 123,) for the government of the Territory south of the river Ohio, it provided, "and the Government of the Territory south of the Ohio shall be similar to that now exercised in the Territory northwest of the Ohio, except so far as is otherwise provided in the conditions expressed in an act of Congress of the present session, entitled, 'An act to accept a cession of the claims of the State of North Carolina to a certain district of western territory.'" Under the Government thus established, slavery existed until the Territory became the State of Tennessee.
On the 7th of April, 1798, (1 Stat. at Large, 649,) an act was passed to establish a Government in the Mississippi Territory in all respects like that exercised in the Territory northwest of the Ohio, "excepting and excluding the last article of the ordinance made for the government thereof by the late Congress, on the 13th day of July, 1787." When the limits of this Territory had been amicably settled with Georgia, and the latter ceded all its claim thereto, it was one stipulation in the compact of cession, that the ordinance of July 13th, 1787, "shall in all its parts extend to the Territory contained in the present act of cession, that article only excepted which forbids slavery." The Government of this Territory was subsequently established and organized under the act of May 10th, 1800; but so much of the ordinance as prohibited slavery was not put in operation there.