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CONSTITUTION OF THE U. STATES.
[BOOK III.
question, respecting the right to make a particular contract, or to acquire a particular property, or to sue on account of a particular injury, belongs to every particular case, and may be renewed in every case. The question forms an original ingredient in every cause. Whether it be in fact relied on, or not, in the defence, it is still a part of the cause, and may be relied on. The right of the plaintiff to sue cannot depend on the defence, which the defendant may choose to set up. His right to sue is anterior to that defence, and must depend on the state of things, when the action is brought. The questions, which the case involves, then, must determine its character, whether those questions be made in the cause or not. The appellants say, that the case arises on the contract; but the validity of the contract depends on a law of the United States, and the plaintiff is compelled, in every case, to show its validity. The case arises emphatically under the law. The act of congress is its foundation. The contract could never have been made, but under the authority of that act. The act itself is the first ingredient in the case, is its origin, is that, from which every other part arises. That other questions may also arise, as the execution of the contract, or its performance, cannot change the case, or give it any other origin, than the charter of incorporation. The action still originates in, and is sustained by, that charter.
The clause, giving the bank a right to sue in the circuit courts of the United States, stands on the same principle with the acts authorizing officers of the United States, who sue in their own names, to sue in the courts of the United States. The post-master general, for example, cannot sue
