Wisconsin’s Anti-Union Model Faces Reckoning as Top Court Shifts

A Wisconsin law that sharply curtailed public employee unions and became a lodestar for the Tea Party movement is the latest target of a small but growing campaign by organized labor to upend red-state legislation in the courts.

A lawsuit filed Nov. 30 with a state circuit court takes aim at Act 10, a 2011 law by then-Gov. Scott Walker (R) that places strict limits on collective bargaining and dues collection, and increases the share of benefits paid by unionized teachers, bus drivers, government support workers, and other public employees.

Government-sector unions seek to leverage the state Supreme Court’s recent ...