The General Government will at all times stand ready to check the usurpations of the state governments; and these will have the same disposition towards the General Government. The people, by throwing themselves into either scale, will infallibly make it preponderate. If their rights are invaded by either, they can make use of the other, as the instrument of redress . . . the state governments will in all possible contingencies afford complete security against invasions of the public liberty by the national authority. Projects of usurpation cannot be marked under pretences so likely to escape the penetration of select bodies of men as of the people at large. The Legislatures will discover better means of information. They can discover the danger at a distance . . . they can at once adopt a regular plan of opposition, in which they can combine all the resources of the community. They can readily communicate with each other in the different states; and unite their common forces for the protection of their common liberty.
Alexander Hamilton The Federalist Papers Federalist No. 28