"It is a federal compact; several sovereign and independent states may unite themselves together by a perpetual confederacy, without each ceasing to be a perfect state. They will together form a federal republic: the deliberations in common will offer no violence to each member, though they may in certain respects put some constraint on the exercise of it, in virtue of voluntary engagements. The extent, modifications, and objects of the federal authority are mere matters of discretion; so long as the separate organization of the members remains, and from the nature of the compact must continue to exist, both for local and domestic, and for federal purposes; the union is in fact, as well as in theory, an association of states, or, a confederacy...."