Marijuana has been legalized in some form by legislatures in 26 states — Pennsylvania, New Jersey, and Delaware among them — and the District of Columbia. But federal law, under the supremacy clause of the U.S. Constitution, supersedes all state laws. And the U.S. government continues to view marijuana as a Schedule 1 substance; it considers cannabis to have "no currently accepted medical use in treatment in the United States." It remains a federal crime to possess, grow, distribute, or prescribe marijuana in any form.