What is the concept of the system of checks and balances?
This is to make sure that one branch of government does not get more power then the other one. This way they can "check" on each other.
The system of checks and balances was a new concept along with Democracy at the time that the practice was implemented in the 1780's. Built within checks and balances is the practice that the Executive (Presidential) Branch, Legislative (Congress) Branch and the Judicial Branch each with the power to monitor and address concerns with the other two branches. No group has the power to run unmonitored under this system.