Which court case set voting requirements, Oregon v. Mitchell or Barron v. Baltimore?
Oregon v. Mitchell: Oregon v. Mitchell, 400 U.S. 112 (1970) was a Supreme Court case which held that the United States Congress could set voting age requirements for federal elections but not for local or state elections. Barron v. Baltimore:  243 (1833), is a landmark United States Supreme Court case in which helped define the concept of federalism in US constitutional law.
Oregon v. Mitchell