Well, since the feds hold it in a 'delegated trust' FOR the State, it means it belongs TO the State.
I believe refusing to give it back would be both theft and breach of contract.
However true, therefore, it may be, that the judicial department is, in all questions submitted to it by the forms of the Constitution, to decide in the last resort, this resort must necessarily be deemed the last in relation to the authorities of the other departments of the government; not in relation to the rights of the parties to the constitutional compact, from which the judicial, as well as the other departments, hold their delegated trusts.
James Madison, Report on the Virginia Resolutions
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Hee, hee, hee!
Remember that famous phrase, “So sue me”.