Answer:
The answer is supplemental jurisdiction.
Step-by-step explanation:
Supplemental jurisdiction consists of United States federal courts' authority to hear other claims that have some relationship with the original claim. However, the court would not have the subject-matter jurisdiction to hear those other claims independently.
Thus, a federal court can hear a federal claim, and at the same time it can hear in a specific way state law claims that have a relationship with the federal claim.