On the general question of slavery, the President's mind was fully made up. He felt that he had no right to interfere with slavery where slavery was lawful, just because he himself did not happen to like it; for he had sworn to do all in his power to "preserve, protect and defend" the government and its laws, and slavery was lawful in the southern States. When freeing the slaves should become necessary in order to preserve the Government, then it would be his duty to free them; until that time came, it was equally his duty to let them alone.

Twice during the early part of the war military commanders issued orders freeing slaves in the districts over which they had control, and twice he refused to allow these orders to stand. "No commanding general should do such a thing upon his responsibility, without consulting him," he said; and he added that whether he, as Commander-in-Chief, had the power to free slaves, and whether at any time the use of such power should become necessary, were questions which he reserved to himself. He did not feel justified in leaving such decisions to commanders in the field. He even refused at that time to allow Secretary Cameron to make a public announcement that the government might find it necessary to arm slaves and employ them as soldiers. He would not cross Fox River until he came to it. He would not take any measure until he felt it to be absolutely necessary.