The upcoming U.S. Supreme Court case Friedrichs v. California Teachers Association could significantly affect public sector labor unions. But a new brief discusses how the case could also affect mandatory bar membership for lawyers.

In Friedrichs, likely to be argued later this year, 10 California schoolteachers are challenging on First Amendment grounds the requirement that they pay dues to the teachers union—even though some of the money goes toward advocacy of educational policy and other issues they oppose.