CHICAGO — The nation's largest association of doctors and the AARP senior citizens' lobby are endorsing President Barack Obama's revised health overhaul legislation. James Rohack, president of the American Medical Association, said Friday that the pending bill isn't perfect, but it's the next step toward real reform of the nation's health care system. Read more: Health Care, Health Care Reform, Health Care Bill, Aarp, Ama, Aarp Health Care, Ama Health Care, Politics News