The new plan scraps fines imposed on taxpayers who do not purchase insurance and instead offers tax credits to those who purchase coverage in the open market.
The latest Associated Press-GfK poll finds that, if forced to choose between repealing the law and implementing it, 56 percent of Americans would repeal it.
Blue Cross spokesman John Maginnis said the Affordable Care Act expanded access to health insurance to millions of Americans, regardless of age or health status, and guaranteed richer benefits.
Experts believe that workers in their 50s and 60s, who may have accumulated savings, will be most likely to give up job-provided insurance for policies on the new public exchanges.
Kevin Charest told congressional investigators he was unable to get answers to his questions from others inside the department, and he concluded that testing of the site was substandard.
A report from the Health and Human Services Department says that more than 137,000 have enrolled in the 36 states served by the federal website, up from fewer than 27,000 in October.