The White House has acknowledged two key components of the new healthcare insurance exchanges will take longer to repair than previously disclosed. On Tuesday, a senior official said the administration is not sure when low-income Americans will be able to enroll in Medicaid online. The White House also acknowledged that online enrollment for Spanish speakers is still inactive. Amidst growing criticism of glitches in the health exchange rollout, the White House said Tuesday it would bring in Jeffrey Zients, a former acting director of the Office of Management and Budget, to oversee the process.