Obscured amid the attention paid to the Court’s end-of-term decisions was its granting of certiorari to a case that could have an enormous impact on the viability of private-sector organizing. It underscores an argument I made about the 1947 Taft-Hartley Act: The law, even 66 years after its passage, “codified a series of legal land mines” that might explode in the face of unions at any time.