In our system of federalism, the Constitution also sets forth a concept of checks and balances by dividing the federal government into...

In our system of federalism, the Constitution also sets forth a concept of "checks and balances" by dividing the federal government into three branches. What are those three branches of government, and how do they serve to act as checks and balances on each other to limit government and prevent abuse of power? Does the system work to this day?