The sovereign in the republican order is the organic people, or state, and is with us the United States, for with us the organic people exist only as organized into States united, which in their union form one compact and indissoluble whole. That is to say, the organic American people do not exist as a consolidated people or state; they exist only as organized into distinct but inseparable States. Each State is a living member of the one body, and derives its life from its union with the body, so that the American state is one body with many members; and the members, instead of being simply individuals, are States, or individuals organized into States, The body consists of many members, and is one body, because the members are all members of it, and members one of another. It does not exist as separate or distinct from the members, but exists in their solidarity or membership one of another. There is no sovereign people or existence of the United States distinguishable from the people or existence of the particular States united. The people of the United States, the state called the United States, are the people of the particular States united.
Orestes Brownson, The American Republic, Chapter XI.