Unconstitutional set-asides : ISTEA's race-based set-asides after Adarand : hearing before the Subcommittee on the Constitution, Federalism, and Property Rights of the Committee on the Judiciary, United States Senate, One Hundred Fifth Congress, first session, examining the use of racial and ethnic preferences in federal procurement programs, focusing on the constitutionality of department of transportation proposed regulations to modify the Disadvantaged Business Enterprise Program for Highway and Transit Projects and related Supreme Court decision in Adarand v. Pena, September 30, 1997.