As far as I know, the supreme court has not ruled on controlled substances. Those are established by congress (and the DEA) and states have their right to have

As far as I know, the supreme court has not ruled on controlled substances. Those are established by congress (and the DEA) and states have their right to have legislation that negates or otherwise "violates" congressional action. Congress can always withhold monies for roads and infra, though, so they can coerce states into cooperation in a different way. The Marriage Equality action by the Supreme Court explicitly states that states cannot illegalize same-sex marriage. Can a state illegalize it? No. Can states legalize the sale of cannabis? Yes. Can the DEA still come in and bust people in those states? Yes. Is that fucked up? You betcha.