Meyer v. Grant
Paul Grant et al, the plaintiffs, were challenging a Colorado statute that made it a felony to pay petition circulators. The plaintiffs had attempted to qualify for the ballot a proposed constitutional amendment to the Colorado Constitution that would have removed motor carriers from the jurisdiction of Colorado's Public Utilities Commission. The federal district court in which the case was first heard upheld the Colorado statute. This decision was appealed by the plaintiffs to the Tenth Circuit, which reversed the lower court, and ruled that the Colorado statute was an unconstitutional infringement on the 1st amendment rights of the plaintiffs.
The state of Colorado then appealed the Tenth Circuit's verdict to the U.S. Supreme Court. The highest court agreed with the Tenth Circuit that the Colorado statute "abridges appellees' right to engage in political speech in violation of the First and Fourteenth Amendments."