Hammer V. Dagenhart

Hammer v. Dagenhart, 247 U.S. 251 (1918), was a United States Supreme Court decision involving the power of Congress to enact child labor laws. The Court held regulation of child labor in purely internal (to a single state) manufacturing, the products of which may never enter interstate commerce, to be beyond the power of Congress, distinguishing the Lottery line of cases, which concerned Congressional regulation of harms (e.g. interstate sale of lottery tickets) that required the use of interstate commerce.

Read more about Hammer V. DagenhartBackground, The Supreme Court's Decision, Subsequent Developments