The Constitution plays a foundational role in American politics by defining the structure of government and protecting individual rights. It establishes the principles of separation of powers, checks and balances, and federalism, guiding the interactions among the legislative, executive, and judicial branches. Additionally, the Bill of Rights guarantees fundamental freedoms, reinforcing the democratic ideals upon which the nation is built. The Constitution serves as a living document, adapting over time through amendments and interpretations, ensuring its continued relevance in addressing contemporary issues in American politics.