The long years of Republican obstruction and obfuscation on health care reform have taken their toll. More than half of Americans still say they don't know how they and their families will be affected by the Affordable Care Act, according to a new Kaiser Family Foundation poll, about the same percentage as in 2010. More Americans have a negative view of the act than a positive one. But now the Obama administration, which has been outshouted by its opponents, is fighting back.