Montana is right.
Why should the Federal government be able to prosecute medical marijuana patients in California, who are totally in compliance with their state's laws (for example)?
Granted it wouldn't prevent Sheriffs from giving the Feds permission, but there is at least the notion that local LEOs do not enforce Federal laws.
Too bad they will probably lose, because this issue has already come up w/re medical marijuana, and the courts sided with the Feds.
Y'all reap what you sow. I hope everyone is pleased.