Under federal law, marijuana is a restricted substance just like cocaine or heroin. Yet, somestates have passed laws that permit marijuana to be grown and sold, and/or used.Explain when and how the U.S. system of law allows state law to contradict federal law.Include concepts of federalism and preemption. San Francisco and Seattle recently raised passed laws to raise the minimum wage above the federal minimum wage.Is this permissible?Does this violate the supremacy clause?Can a baker refuse to make a wedding cake for a gay couple based on the baker's religious beliefs?How does the Constitution help answer this question? What is the name of the most recent U.S. Supreme Court case on this topic?