(Washington, DC) -- Lawmakers continue probing the troubled HealthCare.Gov website. The site for the new healthcare exchanges has been riddled with glitches since its launch October 1st. In a House hearing, Marilyn Tavenner apologized for the problems and said problems are being fixed. Tavenner runs CMS, the Centers for Medicare and Medicaid Services. That's the arm of the Department of Health and Human Services which is responsible for administering HealthCare.Gov.