In the case of Parker v. Monroig, the U.S. Supreme Court was asked to determine whether a federal court in Puerto Rico had jurisdiction over a dispute between two residents of Puerto Rico regarding land ownership on the island. The plaintiff, Parker, argued that because he was an American citizen and Puerto Rico was a territory of the United States, he should be able to bring his suit in federal court rather than local courts. However, defendant Monroig contended that under Foraker Act (1900), which established civil government in Puerto Rico after its acquisition by US following Spanish-American War, cases involving only local matters were meant for resolution within territorial courts. The Supreme Court ruled against Parker stating that even though both parties are American citizens residing in an American territory does not automatically grant them access to federal courts for disputes purely based on internal affairs or local issues such as this one about property rights; they must use territorial courts instead unless there is diversity of citizenship or it involves constitutional questions or laws/treaties of US.

The dissenting opinion in the case of Parker v. Monroig, 1915, was not specifically recorded or attributed to a particular justice. However, it can be inferred that those who dissented may have disagreed with the majority's interpretation of whether U.S. laws applied to Puerto Rico following its acquisition by the United States after the Spanish-American War. The majority held that certain U.S. laws did apply and thus affirmed a lower court decision which had ruled against Mr.Parker on his claim for damages from Ms.Monroig for breach of contract related to property in Puerto Rico.