States trying to legalize marijuana need to add additional laws allowing state troopers/police to arrest federal agents attempting to enforce marijuana laws. I think Wyoming has laws like that for gun control, and it works pretty well.
Do you have any evidence to support this claim or are you just talking nonsense? My understanding of the Wyoming law is it pertains to guns that are 100% made in Wyoming and that never leave the state. Wyoming barely has any people. The number of Wyoming gun owners is a fraction of that. And the number of Wyoming gun owners that own 100% Wyoming made guns is smaller still. Now of those people how many of them have never taken their Wyoming gun out of state? And finally of that infinitesimally small number how many have the time or inclination to risk everything to test federal law just to prove a point?
Do you have case law to back up your assertion? Has there been a precipitous drop in Federal arrests since the law passed? What are you basing your assessment on?