Joint Economic Committee members chairman Brady and co-chair Klobuchar question Federal Reserve Board Chairman Bernanke at Joint Economic Committee in WashingtonVia Caren Bohan and Susan Cornwell WASHINGTON (Reuters) – With the Obamacare site performing better, congressional Republicans on Wednesday returned to their broader assault on President Barack Obama's healthcare legislation, warning that it will harm the standard of hospital therapy and drive up prices. They used hearings in the U.S. Home of Representatives to highlight what they are saying are flaws in the 2010 Affordable Care Act that transcend the possibly transitory problems with the website, HealthCare.gov, and cancellations of a couple of million insurance coverage policies that didn’t meet the regulation's standards. Repeating predictions they’ve been making because the legislation used to be being debated in Congress in 2009, Republicans said it could end up limiting customers' choices of medical doctors and would not directly saddle families and companies with larger premiums. "The Reasonably priced Care Act's fundamental issues can't be fastened with better marketing.