WASHINGTON: In a contentious confirmation hearing to be the nation's top health official Robert F Kennedy Jr. struggled to answer questions about how he would reform Medicaid or Medicare, the government health care programs used by millions of disabled, poor and older Americans. Republican Sen. Bill Cassidy of Louisiana, a physician and key vote Kennedy needs to win, repeatedly pressed the nominee on Wednesday (Jan 29) to share ways he plans to reform Medicaid, a multibillion-dollar taxpayer-