Core finding
Federalism as Buffer and Fault Line
Federalism creates independent state capacity, multiple sources of record, and alternative service delivery, which can make national paralysis harder. The same decentralization can become a fracture line when state and federal actors stop treating courts and constitutional allocation as a common framework and instead claim mutually exclusive final authority.
Why federalism absorbs shocks
States, local governments, courts, utilities, election administrators, universities, firms, and federal programs have overlapping but not identical authority, reducing single points of failure.
Why it can intensify disputes
Independent authority lets states resist, litigate, refuse optional cooperation, or pursue different policies, so political conflict can persist for long periods without resolution.
The fracture threshold
Noncooperation becomes sovereignty fracture only when institutions reject common adjudication and align around incompatible legal, fiscal, administrative, and security orders.
Evidence discipline
Use these findings as mechanism-level synthesis. Historical cases are not templates, scenario ranges are not forecasts, and present-tense legal or institutional claims require current verification.