When you think you can actually join the conversation, please do.
Maybe you can tell us how the 'it is legal under state law, so we will not prosecute it under federal law' argument holds water.
Certainly, states can have whatever laws that want.
That they have whatever law they want in no way nullifies a federal law.
That is, something can be legal according to state law, but illegal under federal law; that someting is legal under state law in no way justifies the decision to not enforce the relevant federal law in that state.
The point of a federal law, after all, is that it applies everywhere, to everyone.