Last week’s election of progressive new legislators and governors in multiple states creates an important opportunity for protecting workers’ rights. During the Trump era, states and cities have become the last line of defense for workers. Liberal state policymakers around the country have fought for higher minimum wages, expanded overtime coverage, paid sick and family leave, and more robust protections for victims of harassment and discrimination. But these protections are just words on a page unless they’re enforced. And unfortunately, the Supreme Court last term did everything it could to undermine enforcement of state and local worker protections. In its Epic Systems decision , the Court held that employers can force workers to give up the right to bring a class action. The decision makes it much harder for most workers to seek redress for workplace wrongs, because group lawsuits help workers overcome their fear of suing the boss and create economies of scale so...