Public-sector unions, long accustomed to getting their way, received a rude awakening this morning. By 5-4, the U.S. Supreme Court ruled in Janus v. AFSCME Council 31 that nonmember state and local government employees are not required to pay partial dues (“agency fees”) to a union representing them. The decision overturns over 40 years of union monopoly power now practiced in nearly two dozen states. In so doing, it will hamper the ability of public-employee unions to route dues collections toward political activism. Justice Samuel Alito, writing for the majority, stated, “States and public-sector unions may no longer extract agency fees from nonconsenting employees.” Union officials fear that millions of workers now will be able to choose whether or not to pay dues. Frankly, such a prospect should be welcomed, not feared.