John Paul Stevens,
North Dakota v. United States…
“ The State, which has established a liquor distribution system in order to promote temperance and ensure orderly market conditions, wishes to protect the integrity of that system by requiring out-of-state shippers to file monthly reports and to affix a label to each bottle of liquor sold to a federal enclave for domestic consumption. The clash between the State's interest in preventing the diversion of liquor and the federal interest in obtaining the lowest possible price forms the basis for the Federal Government's Supremacy Clause and pre-emption challenges to the North Dakota regulations. ”
