Two important cases involving the 18th Amendment were Hawke v. Smith and Olmstead v. United States. The 18th Amendment was the constitutional prohibition on the manufacture, sale and distribution of alcohol and spirits in the United States. Although the amendment took effect in 1920, it was repealed in 1933.
The case of Hawke v. Smith was the landmark case that challenged the method in which the 18th Amendment was passed by the Ohio legislature. According to the Supreme Court, voters in Ohio could not overturn the legislature in their ratification of the 18th amendment, despite the fact that the majority of voters were against the amendment and prohibition.
The Olmstead case was important as the Supreme Court addressed and clarified the law as it related to the use of telephone conversations as evidence in a case that involved prohibition.