The new deal was mainly based on the ideas of the economist John Keynes
President Andrew Johnson had long wanted to dismiss the Secretary of War, Edwin M. Stanton. Stanton was the only member of Johnson's cabinet who supported the Radical Republicans' program for reconstruction. On August 12, Johnson suspended Stanton. In his place, Johnson appointed the popular General Ulysses S. Grant Secretary of War.
Congress overruled Stanton's suspension and Grant resigned his position.
Ignoring Congress, Johnson formally dismissed Stanton on February 21, 1868
The system of checks and balances was established by the founding fathers. All branches of the U.S. government has its own set of duties and capacities called separation of powers. Each branch is able to check the powers of the other branch to prevent any abuse of power.