Rep. Pete Stark of Fremont (CA), who would play a key role in the national health care debate if Democrats take control of the House in November, announced a plan Tuesday for universal medical insurance for all Americans. Stark, the ranking Democrat on the House Ways and Means health subcommittee, offered a plan that is based on Medicare's payment rates and low-cost administrative structure and a requirement that employers provide coverage for all their workers, even part-timers. By offering his far-reaching plan, Stark laid down a marker, letting it be known that he and other advocates of the long-debated idea...