Can state governments use their public workforce to funnel money from taxpayers to their political allies against the will of public employees? That question will be argued before the Supreme Court this week.

The case is Janus v. AFSCME, and the question is whether governments can compel public employees who aren’t union members to pay dues or fees to the union. This is important for Democrats because public-employee unions are key allies and the involuntary dues fund these unions to push more public employees into joining.