marijuana federal law vs state laws
Conflict between State Law and Federal Law. Federal law clearly conflicts with many state laws concerning marijuana. Under the Preemption Clause of the Constitution, a federal law will always trump a state law.In simple terms, anyone on federal property, including national parks, will be subject to federal law.onflict between State Law and Federal Law. Federal law clearly conflicts with many state laws concerning marijuana. Under the Preemption Clause of the Constitution, a federal law will always trump a state law.