erly jur- isprudence dictates the non-decision of constitutional questions until they must be resolved in the crucible, f a live contro- versy (see Ashwander TVA, 297 U.S. 288, 346-47, 56 S.Ct. 466, 482-83, 80 L.Ed. 688 (1936) (Brandeis, J., concur- ring)), nothing in this opinion should be construed a