Arizona state senate passed this last week. Actually has fines and can arrest Federal agents. I'm very interested in seeing this play out.
"The bill provides that all services performed in the state, and all goods grown or made here for consumption within Arizona 'are not subject to the authority of Congress under its constitutional power to regulate commerce among the several states.'” ..this includes gun manufacturing.
"The bill states that any federal agent or employee who attempts to enforce any federal act, rule or regulation over these activities is guilty of a Class 6 felony. While the measure does not seek jail time, it allows fines of up to $2,000. And any state official that tries to enforce a federal law could face a $500 fine."
Arizona SB1178 Moves Forward: Felony Charges for Federal Agents – Tenth Amendment Center Blog