Article III, Section 2, Clause 1:
The Judicial Power shall extend to all Cases, in Law and Equity, arising under this Constitution, the Laws of the United States, and Treaties made, or which shall be made, under their Authority;—to all Cases affecting Ambassadors, other public Ministers and Consuls;—to all Cases of admiralty and maritime Jurisdiction; to Controversies to which the United States shall be a Party;—to Controversies between two or more States; between a State and Citizens of another State; between Citizens of different States,—between Citizens of the same State claiming Lands under Grants of different States, and between a State, or the Citizens thereof, and foreign States, Citizens or Subjects.
In the first edition of his Treatise, Justice Story noted that while "an express power is no where given in the constitution," the right of the United States to sue in its own courts "is clearly implied in that part respecting the judicial power. . . . Indeed, all the usual incidents appertaining to a personal sovereign, in relation to contracts, and suing, and enforcing rights, so far as they are within the scope of the powers of the government, belong to the United States, as they do to other sovereigns." 1 As early as 1818, the Supreme Court ruled that the United States could sue in its own name in all cases of contract without congressional authorization of such suits. 2 Later, this rule was extended to other types of actions. In the absence of statutory provisions to the contrary, such suits are initiated by the Attorney General in the name of the United States. 3
By the Judiciary Act of 1789, and subsequent amendments to it, Congress has vested in the federal district courts jurisdiction to hear all suits of a civil nature at law or in equity brought by the United States as party plaintiff. 4 As in other judicial proceedings, the United States, like any party plaintiff, must have an interest in the subject matter and a legal right to the remedy sought. 5 Under the long-settled principle that the courts have the power to abate public nuisances at the suit of the government, the provision in § 208(2) of the Labor Management Relations Act of 1949, authorizing federal courts to enjoin strikes that imperil national health or safety was upheld on the grounds that the statute entrusts the courts with the determination of a "case or controversy" on which the judicial power can operate and does not impose any legislative, executive, or non-judicial function. Moreover, the fact that the rights sought to be protected were those of the public in unimpeded production in industries vital to public health, as distinguished from the private rights of labor and management, was held not to alter the adversary ("case or controversy") nature of the litigation instituted by the United States as the guardian of the aforementioned rights. 6 Also, by reason of the highest public interest in the fulfillment of all constitutional guarantees, "including those that bear . . . directly on private rights, . . . it [is] perfectly competent for Congress to authorize the United States to be the guardian of that public interest in a suit for injunctive relief." 7