e [ In order to diminish the number of these suits, it was decided that in a great many Federal causes the courts of the States should be empowered to decide conjointly with those of the Union, the losing party having then a right of appeal to the Supreme Court of the United States. The Supreme Court of Virginia contested the right of the Supreme Court of the United States to judge an appeal from its decisions, but unsuccessfully. See “Kent’s Commentaries,” vol. i. p. 300, pp. 370 et seq.; Story’s “Commentaries,” p. 646; and “The Organic Law of the United States,” vol. i. p. 35.] This was a severe blow upon the independence of the States, which was thus restricted not only by the laws, but by the interpretation of them; by one limit which was known, and by another which was dubious; by a rule which was certain, and a rule which was arbitrary. It is true the Constitution had laid down the precise limits of the Federal supremacy, but whenever this supremacy is contested by one of the States, a Federal tribunal decides the question. Nevertheless, the dangers with which the independence of the States was threatened by this mode of proceeding are less serious than they appeared to be. We shall see hereafter that in America the real strength of the country is vested in the provincial far more than in the Federal Government. The Federal judges are conscious of the relative weakness of the power in whose name they act, and they are more inclined to abandon a right of jurisdiction in cases where it is justly their own than to assert a privilege to which they have no legal claim. Different Cases Of Jurisdiction The matter and the party are the first conditions of the Federal jurisdiction—Suits in which ambassadors are engaged—Suits of the Union—Of a separate State—By whom tried—Causes resulting from the laws of the Union—Why judged by the Federal tribunals—Causes relating to the performance of contracts tried by the Federal courts—Consequence of this arrangement. After having appointed the means of fixing the competency of the Federal courts, the legislators of the Union defined the cases which should come within their jurisdiction. It was established, on the one hand, that certain parties must always be brought before the Federal courts, without any regard to the special nature of the cause; and, on the other, that certain causes must always be brought before the same courts, without any regard to the quality of the parties in the suit. These distinctions were therefore admitted to be the basis of the Federal jurisdiction. Ambassadors are the representatives of nations in a state of amity with the Union, and whatever concerns these personages concerns in some degree the whole Union. When an ambassador is a party in a suit, that suit affects the welfare of the nation, and a Federal tribunal is naturally called upon to decide it.