States, rule of law, democracy (and every other government type) and constitutions are mental constructs. They are linked together by the idea of a natural dependency. The only thing upholding any and all of these is the willingness to uphold the oath sworn by all those granted public authority, be that legislature, executive or judicial. They all check each other - in theory. Which is why they swear on the constitution - not a person - because that is the very thing that granted them the power and that acts as the web that weaves them all together.

If they stop checking and balancing each other than there’s nothing holding the statedom together - there’s afterall no natural consequence to breaking the web