5. The boundaries between the treaty-making and the legislative departments of the government, became a subject of examination after the war, and gave rise to questions deeply affecting the working of these two departments. A treaty is the supreme law of the land, and as such it becomes obligatory on the House of Representatives to vote the money which it stipulates, and to co-operate in forming the laws necessary to carry it into effect. That is the broad proposition. The qualification is in the question whether the treaty is confined to the business of the treaty-making power? to the subjects which fall under its jurisdiction? and does not encroach upon the legislative power of Congress? This is the qualification, and a vital one: for if the President and Senate, by a treaty with a foreign power, or a tribe of Indians, could exercise ordinary legislation, and make it supreme, a double injury would have been done, and to the prejudice of that branch of the government which lies closest to the people, and emanates most directly from them. Confinement to their separate jurisdictions is the duty of each; but if encroachments take place, which is to judge? If the President and Senate invade the legislative field of Congress, which is to judge? or who is to judge between them? or is each to judge for itself? The House of Representatives, and the Senate in its legislative capacity, but especially the House, as the great constitutional depository of the legislative power, becomes its natural guardian and defender, and is entitled to deference, in the event of a difference of opinion between the two branches of the government. The discussions in Congress between 1815 and 1820 greatly elucidated this question; and while leaving unimpugned the obligation of the House to carry into effect a treaty duly made by the President and Senate within the limits of the treaty making power--upon matters subject to treaty regulation--yet it belongs to the House to judge when these limits have been transcended, and to preserve inviolate the field of legislation which the constitution has intrusted to the immediate representatives of the people.