What was the new American political system in 1789?

In 1789, the new American political system was established under the Constitution, which created a federal government with a system of checks and balances among three branches: the executive, legislative, and judicial. This system aimed to prevent any single branch from becoming too powerful. The Bill of Rights, ratified shortly thereafter, guaranteed individual liberties and rights. This framework laid the foundation for modern American democracy, emphasizing the principles of popular sovereignty and representative government.