Federalism: Federalism is the division of powers between the national government and state governments. It ensures that both levels of government have separate roles and responsibilities while sharing some powers.
Supreme Court: The Supreme Court is the highest judicial body in the United States. It acts as an institution that interprets the Constitution, resolves disputes between states and federal government, and maintains balance between them.
Congress: Congress consists of two houses - the Senate and the House of Representatives. It is responsible for making laws, representing citizens' interests at both state and federal levels, and serving as a check on executive power.