The U.S. Supreme Court last week agreed to hear a case that has labor union bosses worried. Very worried. In the case, Friedrichs vs. California Teachers Association, Rebecca Friedrichs and nine other California public schoolteachers are challenging the requirement that they pay mandatory "fair share" fees to a union. They argue that being forced to pay these fees, even those that only go toward collective bargaining and contract administration, is a violation of their right to free speech under the U.S. Constitution. Why? Because they don't agree with the political views of the teachers union that wants their money. The...