Holder v. Humanitarian Law Project

The Humanitarian Law Project and other plaintiffs wanted to train and assist two U.S.-designated terrorist organizations, the PKK and LTTE, in using international law to resolve disputes peacefully and in petitioning bodies like the United Nations, but a federal statute barred providing "material support" to organizations designated as engaging in terrorist activity. After the district court partially granted a preliminary injunction and the court of appeals affirmed, the government sought Supreme Court review of whether the material-support ban violated the plaintiffs' First Amendment rights.