Question 1 of the Checklist of Issues on Enforcement
3. According to the US response to question 1 of the Checklist of Issues on Enforcement,18 federal district courts, in addition to state courts, may have "jurisdiction over claims of trademark infringement, misappropriation of trade secrets, or unfair competition based on state laws...depending on the nature of the claims and the parties involved".
Please specify, in greater detail, the nature of claims and types of parties for which federal district courts may also have jurisdiction over claims based on state laws and set forth the relevant statutory provisions or other relevant legal authority.