It doesn’t take much to derail, or at least significantly distract, a U.S. Supreme Court nomination.

Remember Samuel Alito Jr.’s long-ago membership in a group that wanted Princeton University to remain all-male? It kicked up a fuss, as did John Roberts Jr.’s ruling upholding the arrest of a 12-year-old girl for eating a single french fry in a Washington subway station. Critics called it heartless.