A former top Obama administration health official, Don Berwick, formally announced Monday that he is running for governor of Massachusetts. Berwick, a Democrat, is a physician and health policy expert who ran the Centers for Medicare & Medicaid Services for President Barack Obama. But amid the heated politics of health reform, Republicans refused to confirm him to the position atop CMS. They said his comments praising Britain's health care system suggested he favored rationing, an interpretation he disputed.
