What type of court system does the United States have?

The United States operates under a dual court system, which is comprised of both federal and state courts. This structure allows for the separation of legal authority and jurisdiction, where federal courts handle cases involving federal law, constitutional issues, treaties, and disputes between states or citizens of different states. State courts, on the other hand, deal with the vast majority of legal disputes, including those related to state laws, family matters, crimes, and local regulations.

The dual court system is crucial for upholding the federal structure of government established by the Constitution, allowing both state and federal governments to have their own distinct legal systems that operate independently yet can interact with one another in certain legal contexts. This system provides a balance of power and ensures that both federal and state interests are represented within the judicial framework.

In contrast, the other options reflect incomplete or incorrect understandings of the U.S. legal system. For instance, a federal court system only would ignore the significant role of state courts. A national court system implies a single system that does not account for the individuality and jurisdictional powers of state courts. Finally, suggesting that there are state courts only omits the important function federal courts serve in the American judiciary.