What is one responsibility that is only for United States citizens?

Serving on a jury is a responsibility that is specifically reserved for United States citizens. This civic duty is foundational to the legal system and ensures that a jury of peers can fairly assess cases in court, reflecting a cross-section of the community. Since only citizens have the legal status that grants them the right to participate fully in the democratic processes, including jury service, this responsibility is not extended to non-citizens.

Paying taxes is a requirement for both citizens and non-citizens who earn income in the U.S., making it a shared responsibility rather than a unique one. Voting in elections is also a right that is limited to citizens, but it's not classified as a responsibility in the same way that serving on a jury is because the act of voting is voluntary. Obeying the law is universally expected of everyone living in a community, regardless of citizenship status, which further differentiates it from the specific duty of jury service.