United States politics is characterized by a complex system of governance that includes a federal structure, where power is divided between the national and state governments. The political landscape is dominated by two major parties: the Democratic Party and the Republican Party, which often have opposing views on key issues such as healthcare, immigration, and taxation. Elections play a crucial role in shaping U.S. politics, with citizens participating in local, state, and federal elections to choose their representatives. The Constitution serves as the foundational legal document, outlining the rights of citizens and the responsibilities of government, ensuring a balance of power among the three branches: executive, legislative, and judicial.