The Supreme Court will get another chance to wreck unions.

The nation’s highest court will hear Janus v. AFSCME, which challenges the collection of mandatory fees for public sector workers. It’s the second case of its type; another, Freidrichs v. California Teachers Association, resulted in a 4-4 deadlock after the death of Antonin Scalia. In both cases, plaintiffs argue that the mandatory fees violate their First Amendment rights by obligating ...