What aspect of U.S. politics is most closely tied to the concept of indirect democracy?

The aspect of U.S. politics most closely tied to the concept of indirect democracy is the electoral system, particularly the use of representatives. In the U.S., citizens elect officials to make decisions on their behalf, rather than directly voting on every policy issue. This representative system is designed to balance the need for public input with the complexities of governance, allowing elected officials to navigate and make informed decisions on behalf of their constituents.