The ACLU v. Clapper case is about freedom and privacy. The ACLU (American Civil Liberties Union) wanted to stop the government from spying on people's phones and computers without a warrant. The Clapper case was about whether or not it was okay for the government to do this without getting permission from a judge. The Clapper court said that the government is allowed to do this, but the ACLU said that it violated the right to privacy that the Constitution gives to citizens of the United States. The Supreme Court ruled in favor of Clapper, meaning that the government did not need to get permission from a judge in order to spy on people’s phones and computers.