Washington (CNN) - White House spokesman Jay Carney denied Friday that next year's midterm elections are the reason behind the administration's decision to postpone the 2014 opening date for 2015 enrollment in Obamacare - from October 15 to November 15.

Pushing back the start date, Carney said, will give insurers more time to get an idea of their new pool of customers before they set their 2015 rates.