Mr. PICKERING said, if he entertained the opinion just now expressed by the gentleman from Delaware, (Mr. WELLS,) of the binding force of all treaties made by the President and Senate, he should think it to be his duty to vote for the bill now under consideration. “The constitution, and the laws of the United States made in pursuance thereof, and all treaties made, or which shall be made under the authority of the United States, shall be the supreme law of the land.”--But a treaty to be thus obligatory, must not contravene the constitution, nor contain any stipulations which transcend the powers therein given to the President and Senate. The treaty between the United States and the French Republic, professing to cede Louisiana to the United States, appeared to him to contain such an exceptionable stipulation--a stipulation which cannot be executed by any authority now existing. It is declared in the third article, that “the inhabitants of the ceded territory shall be incorporated in the Union of the United States.” But neither the President and Senate, nor the President and Congress, are competent to such an act of incorporation. He believed that our Administration admitted that this incorporation could not be effected without an amendment of the constitution; and he conceived that this necessary amendment could not be made in the ordinary mode by the concurrence of two-thirds of both Houses of Congress, and the ratification by the Legislatures of three-fourths of the several States. He believed the assent of each individual State to be necessary for the admission of a foreign country as an associate in the Union; in like manner as in a commercial house, the consent of each member would be necessary to admit a new partner into the company; and whether the assent of every State to such an indispensable amendment were attainable, was uncertain. But the articles of a treaty were necessarily related to each other; the stipulation in one article being the consideration for another. If, therefore, in respect to the Louisiana Treaty, the United States fail to execute, and within a reasonable time, the engagement in the third article, (to incorporate that territory into the Union,) the French Government will have a right to declare the whole treaty void. We must then abandon the country, or go to war to maintain our possession. But it was to prevent war that the pacific measures of the last winter were adopted--they were to “lay the foundation for future peace.” Mr. P. had never doubted the right of the United States to acquire new territory, either by purchase or by conquest, and to govern the territory so acquired as a dependent province; and in this way might Louisiana have become a territory of the United States, and have received a form of government infinitely preferable to that to which its inhabitants are now subject.