President Barack Obama recruited former President Bill Clinton to help promote his landmark health care law Tuesday, just days before the law's open enrollment begins. In an informal discussion of health care reform at a Clinton Global Initiative forum in New York, while Obama was in town for the U.N. General Assembly, he warned that Republicans have been trying to "scare" people into choosing not to get health care coverage. He acknowledged that the law isn't popular. But he said its mandates are crucial to ensuring the law works. The conversation Tuesday came amid a renewed push by Democrats to publicize the benefits of the law before open enrollment in the health care exchanges it created begins Oct. 1. Meanwhile, its Republican opponents are rolling out a publicity campaign of their own, and some are trying to tie a measure defunding it to the bill to keep funding the federal government.