US Presidency
1880

State rights and the rights of the United States should be equally respected. Both are essential to the preservation of our liberties and the perpetuity of our institutions. But in endeavoring to vindicate the one we should not allow our zeal to nullify or impair the other. * * * The true doctrine, as we conceive, is this, that while the States are really sovereign as to all matters which have not been granted to the jurisdiction and control of the United States, the Constitution and constitutional laws of the latter are, as we have already said, the supreme law of the land, and when they conflict with the laws of the States they are of paramount authority and obligation. This is the fundamental principle on which the authority of the Constitution is based, and unless it be conceded in practice as well as theory the fabric of our institutions, as it was contemplated by its founders, can not stand.