A group of California teachers fighting mandatory union fees at the U.S. Supreme Court had, by all appearances, a good day Monday. Supreme Court justices seemed receptive to the arguments brought by teachers in the Friedrichs v. California Teachers Association case. If the case is successful, Rebecca Friedrichs and other government workers across the nation will gain the ability to opt out of agency fees unions charge to nonmembers. Remarks from several of the justices indicated they agree with Friedrichs on a central point, that public sector union negotiations are inherently political because they involve taxpayer money, public employees, and...