Really? Which clause is that?
Your refusal to seriously answer the question isn't unexpected. Lost Causers seem to have this persistent notion that the state is the fundamental particle of sovereignty, and nothing below is valid and nothing above is more than an matter of convenience, to be renounced at the slightest whim.
Bubba, are you serious? The entire USC defines the roll of FedGov and state. Even you are not that stupid. I did a search on the word state in the USC, 100 matches.