The Constitution plays a fundamental role in shaping government power by outlining the legal framework within which governance operates. It delineates the structure of government, defines the powers and responsibilities of various branches, and enshrines the rights of citizens. This foundational document serves as a check on governmental authority, ensuring that power is not concentrated in any single entity. By establishing a system of checks and balances, the Constitution safeguards against tyranny and promotes the rule of law in the political landscape.