Not really. The Feds do not recognize MJ as a prescription
drug. They classify it as not having any medicinal benefit.
Morphine, while highly regulated, is recognized.
So, if having a shotgun is legal in your state, but the Federal Gov't decides that no one should own one; the police should be able to come to your home and collect your weapons?
I guess I'm in the minority; I'm a States Right backer.