It landed like news of yet another skirmish in America’s long-running civil conflict over religion, sexuality, and schools. On Monday, the Supreme Court agreed to hear a challenge from Catholic preschools in Colorado that want access to the state’s taxpayer-funded Universal Preschool Program (UPK). They want that money without complying with Colorado’s rule that families get an "equal opportunity" to enroll, which compels them to admit those who don’t align with traditional Catholic views on homosexuality, sex, and gender. Same old unresolved church and state conflict. But the case is more instructive than that in the Trump era, during which the tide has shifted back toward cultural conservatism. It says something about an emerging, broader pattern. The culture war is transmuting from the kind of free-speech conflict that tore through campuses into a fiscal one, where clashes take place over eligibility rules, grant conditions, and...