Knowing When to Fight: Have They Finally Crossed the Line?

The constitution itself specifies a republican form of government. The founders hated democracy. They knew that democracies always devolve into organized mob rule. Specifically, the US is a Constitutional Representative Republic. That is the technical name for the form of government adopted under our Constitution. Period.

The hatred of democracy found in the less aristocratical of the founders is directed toward what is called "pure democracy" or "simple democracy," and this is contrasted with a democratic republic of the sort then being proposed for the U.S. This common and rather stupid confusion over "democracy" and "republic" was cleared up by Thomas Paine in "The Rights of Man" over 200 years ago. Rather than re-explain it, I'll just quote him on it:

What is called a republic is not any particular form of government. It is wholly characteristical of the purport, matter or object for which government ought to be instituted, and on which it is to be employed, Res-Publica, the public affairs, or the public good; or, literally translated, the public thing. It is a word of a good original, referring to what ought to be the character and business of government; and in this sense it is naturally opposed to the word monarchy, which has a base original signification. It means arbitrary power in an individual person; in the exercise of which, himself, and not the res-publica, is the object.

Every government that does not act on the principle of a Republic, or in other words, that does not make the res-publica its whole and sole object, is not a good government. Republican government is no other than government established and conducted for the interest of the public, as well individually as collectively. It is not necessarily connected with any particular form, but it most naturally associates with the representative form, as being best calculated to secure the end for which a nation is at the expense of supporting it.

Various forms of government have affected to style themselves a republic. Poland calls itself a republic, which is an hereditary aristocracy, with what is called an elective monarchy. Holland calls itself a republic, which is chiefly aristocratical, with an hereditary stadtholdership. But the government of America, which is wholly on the system of representation, is the only real Republic, in character and in practice, that now exists. Its government has no other object than the public business of the nation, and therefore it is properly a republic; and the Americans have taken care that this, and no other, shall always be the object of their government, by their rejecting everything hereditary, and establishing governments on the system of representation only. Those who have said that a republic is not a form of government calculated for countries of great extent, mistook, in the first place, the business of a government, for a form of government; for the res-publica equally appertains to every extent of territory and population. And, in the second place, if they meant anything with respect to form, it was the simple democratical form, such as was the mode of government in the ancient democracies, in which there was no representation. The case, therefore, is not, that a republic cannot be extensive, but that it cannot be extensive on the simple democratical form; and the question naturally presents itself, What is the best form of government for conducting the Res-Publica, or the Public Business of a nation, after it becomes too extensive and populous for the simple democratical form? It cannot be monarchy, because monarchy is subject to an objection of the same amount to which the simple democratical form was subject.

It is possible that an individual may lay down a system of principles, on which government shall be constitutionally established to any extent of territory. This is no more than an operation of the mind, acting by its own powers. But the practice upon those principles, as applying to the various and numerous circumstances of a nation, its agriculture, manufacture, trade, commerce, etc., etc., a knowledge of a different kind, and which can be had only from the various parts of society. It is an assemblage of practical knowledge, which no individual can possess; and therefore the monarchical form is as much limited, in useful practice, from the incompetency of knowledge, as was the democratical form, from the multiplicity of population. The one degenerates, by extension, into confusion; the other, into ignorance and incapacity, of which all the great monarchies are an evidence. The monarchical form, therefore, could not be a substitute for the democratical, because it has equal inconveniences.

Much less could it when made hereditary. This is the most effectual of all forms to preclude knowledge. Neither could the high democratical mind have voluntarily yielded itself to be governed by children and idiots, and all the motley insignificance of character, which attends such a mere animal system, the disgrace and the reproach of reason and of man.

As to the aristocratical form, it has the same vices and defects with the monarchical, except that the chance of abilities is better from the proportion of numbers, but there is still no security for the right use and application of them.

Referring them to the original simple democracy, it affords the true data from which government on a large scale can begin. It is incapable of extension, not from its principle, but from the inconvenience of its form; and monarchy and aristocracy, from their incapacity. Retaining, then, democracy as the ground, and rejecting the corrupt systems of monarchy and aristocracy, the representative system naturally presents itself; remedying at once the defects of the simple democracy as to form, and the incapacity of the other two with respect to knowledge.

Simple democracy was society governing itself without the aid of secondary means. By ingrafting representation upon democracy, we arrive at a system of government capable of embracing and confederating all the various interests and every extent of territory and population; and that also with advantages as much superior to hereditary government, as the republic of letters is to hereditary literature.

It is on this system that the American government is founded. It is representation ingrafted upon democracy. It has fixed the form by a scale parallel in all cases to the extent of the principle. What Athens was in miniature America will be in magnitude. The one was the wonder of the ancient world; the other is becoming the admiration of the present. It is the easiest of all the forms of government to be understood and the most eligible in practice; and excludes at once the ignorance and insecurity of the hereditary mode, and the inconvenience of the simple democracy.

That's from "The Rights of Man," book II, ch. 3

States are simply collections of people.  The state doesn't do anything.  People in the state do things.  "A contract between states" is simply shorthand for "a contract between the people of these states."