The Supreme Court ruled Wednesday that pubic sector unions for state and local employees can’t force non-members to pay a “fair-share” union fee. In a 5-4 ruling Tuesday, the court said the extraction of agency fees from non-consenting public sector employees violates the First Amendment. The case centers on an Illinois law, similar to those in 22 other states, that allow public-sector unions to collect a “fair-share fee” from employees for non-political activities like collective bargaining, regardless of whether those employees belong to the union or not. Mark Janus, a state child support specialist at the center of the case,...