where do the checks and balances come from
Separation of powers To prevent one branch from becoming supreme, protect the "opulent minority" from the majority, and to induce the branches to cooperate, government systems that employ a separation of powers need a way to balance each of the branches. Typically this was accomplished through a system of "checks and balances", the origin of which, like separation of powers itself, is specifically credited to Montesquieu. Checks and balances allow for a system-based regulation that allows one branch to limit another, such as the power of the United States Congress to alter the composition and jurisdiction of the federal courts. Both bipartite and tripartite governmental systems apply the principles of the separation of powers to allow for the branches represented by the separate powers to hold each other reciprocally responsible to the assertion of powers as apportioned by law. The following example of the separation of powers and their mutual checks and balances for the experience of the United States Constitution is presented as illustrative of the general principles applied in similar forms of government as well.
Powers of the President of the United States The Separation of Powers devised by the founding fathers was designed to do one primary thing: to prevent the majority from ruling with an iron fist. Based on their experience, the framers shied away from giving any branch of the new government too much power. The separation of powers provides a system of shared power known as "checks and balances". For example, the President appoints judges and departmental secretaries, but these appointments must be approved by the Senate. The president can veto bills, or deny them. If he does that, the bill is sent back to Congress.