You may have heard about Argentina's plan to nationalize private retirement accounts. Some Democrats on Capitol Hill are inspired, and with their big election victory they may get the chance to test Peronist ideas in America. Meet Congressmen George Miller and Jim McDermott, who are eager to change the way Americans save for their golden years. They'll also be powerbrokers in the next Congress. Mr. Miller, who came in with the Class of 1974 from California, chairs the House Education and Labor Committee. Mr. McDermott, who has represented Seattle the past two decades, runs a House Ways and Means subcommittee...