Has the system of checks and balances been successful in preventing any one branch of government from expanding its powers?

The system of checks and balances has been largely successful in preventing any one branch of government from becoming too powerful. Each branch—executive, legislative, and judicial—has specific powers and the ability to limit the actions of the others, which promotes accountability and cooperation. However, there have been instances where branches have overstepped their authority, leading to ongoing debates about the effectiveness of these checks in practice. Overall, while not foolproof, the system has played a crucial role in maintaining a balance of power.