So if the Articles created a perpetual union unalterable by any state, and the Constitution created a more perfect union, those who now believe it can be altered by a state have a tough row to hoe.
Only if "perfect" means "perpetual" and "unalterable by any state." Why should that be the case for a political union?
One could argue that a "perfect" political union
is one alterable by any state. Since secession is not mentioned in the Constitution but all powers not delegated to the Federal Government are reserved to the states, and the people, I would more likely think that "more perfect"
does mean alterable by any state.