508 U.S. 439 508 U.S. 439 113 S.Ct. 2173 124 L.Ed.2d 402 UNITED STATES NATIONAL BANK OF OREGON, Petitioner,v.INDEPENDENT INSURANCE AGENTS OF AMERICA, INC., et al. Eugene R. LUDWIG, Comptroller of the Currency, et al., Petitioners, v. INDEPENDENT INSURANCE AGENTS OF AMERICA, INC., et al. Nos. 92-484, 92-507. Argued April 19, 1993. Decided June 7, […]