On March 15th, in Lindke v. Freed, the Supreme Court established the test for when local government officials are considered "state actors" for the purposes of the First Amendment when they post on social media. The case is a win for local governments, as the test provided by the Supreme Court safeguards the free speech rights of elected officials while balancing the rights of their citizens.
The National League of Cities (NLC) has created two resources to help local governments navigate this in practical terms:


