Lincoln was the actual head of the administration, and whenever he chose to do so he controlled Secretary of War Stanton as well as the other Cabinet ministers.
Secretary Stanton on one occasion said: "Now, Mr. President, those are the facts and you must see that your order cannot be executed."
Lincoln replied in a somewhat positive tone: "Mr. Secretary, I reckon you'll have to execute the order."
Stanton replied with vigor: "Mr. President, I cannot do it. This order is an improper one, and I cannot execute it."
Lincoln fixed his eyes upon Stanton, and, in a firm voice and accent that clearly showed his determination, said: "Mr. Secretary, it will have to be done."
It was done.