International law in general — Relation to municipal law — Treaties — Requirement that United States control trade in drugs in accordance with treaty — Whether permitting Congress to legislate in matters normally reserved for the States — The law of the United States

Treaties — Conclusion and operation of treaties — Operation and enforcement — Necessity for municipal legislation — Treaty obliging the United States to take action to control trade in drugs — Whether duty to comply with treaty justifies Congress in passing criminal legislation regulating activities within one State — The law of the United States