President Barack Obama will turn to his unofficial "secretary of explaining stuff," former President Bill Clinton, on Tuesday to help with a final push to extol the benefits of U.S. healthcare reform before new insurance exchanges go live on October 1. Obama, who is in New York for the United Nations General Assembly, will meet with his most recent Democratic predecessor at the Clinton Global Initiative, a conference where the two men will talk about Obama's healthcare reform law, which Republicans continue to try to repeal.