In 2016 the Supreme Court was expected to overrule a nearly 40-year old precedent requiring public sector employees who don’t join the union to pay their “fair share” of collective bargaining costs. Justice Scalia died shortly after the Court heard oral argument in Friedrichs v. California Teachers Association. The Court ultimately issued a 4-4 decision which, practically speaking, kept Abood v. Detroit Board of Education (1977) on the books.
With a ninth Justice now on the bench the Supreme Court has agreed to try again to decide whether to overturn Abood in Janus v. American Federation of State, County and Municipal Employees. More than 20 states authorize fair share for public sector employees.