US Presidency
1867

Every weaker passion will disappear before that love of liberty and law for which the American people are distinguished above all others in the world. How far the duty of the President to preserve, protect, and defend the Constitution requires him to go in opposing an unconstitutional act of Congress is a very serious and important question, on which I have deliberated much and felt extremely anxious to reach a proper conclusion. Where an act has been passed according to the forms of the Constitution by the supreme legislative authority, and is regularly enrolled among the public statutes of the country, Executive resistance to it, especially in times of high party excitement, would be likely to produce violent collision between the respective adherents of the two branches of the Government. This would be simply civil war, and civil war must be resorted to only as the last remedy for the worst of evils. Whatever might tend to provoke it should be most carefully avoided.