1) you'd have 50 new countries of which about 4 would have a real military
2) Anarchy

Not good choices. IMO the federal governments only concern should be defense. That is it. Let the states fend for themselves with protection at a larger level so they all can remain independent to do what they wish.

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An unwavering defender of those I see worth protecting.

"promote the general welfare, not provide the general welfare"

We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.