Whether the Judiciary Act permits federal diversity jurisdiction when parties sharing a joint interest include persons who are not competent to sue or be sued in federal court.
Holding
No. For a joint interest, every person represented in that interest must be competent to sue or liable to be sued in federal court.
Reasoning
Chief Justice Marshall read the Judiciary Act’s language—covering suits between a citizen of the forum state and a citizen of another state—to require complete eligibility among the parties to each opposing joint interest. The statute did not permit federal jurisdiction merely because some parties on opposing sides had the requisite diverse citizenship.
Where an interest is joint, the Court treated all persons holding that interest as necessary to the jurisdictional inquiry. Thus, each person on the plaintiff side of a joint interest had to be entitled to sue each person on the defendant side in federal court, and each person on a jointly held defendant interest had to be subject to suit there.
The Court expressly limited its decision. It did not decide the different situation in which several parties possess several distinct interests and only some of them satisfy the federal-court citizenship requirement. Because the case involved a joint interest that did not meet the Court’s all-parties requirement, jurisdiction could not be sustained and the decree was affirmed.