Rep. Steve Chabot argued the executive branch had no authority to alter it.
HHS said the bulk of determinations came in states that opted to expand their programs.
The Star-Telegram story on participants' experiences had gone viral.
Health and Human Services said the site was "stable" under the heavy traffic.
More than 7 million people enrolled in ObamaCare during the first open enrollment period, President...
Those who didn't pay didn't get the coverage they signed up for.
Michael Robertson said healthcare reform was one of the reasons he went to work for Obama.