Bits and pieces have leaked out over the past few weeks about flaws in the site’s development process. Monday night, however, Republican lawmakers who oppose Obamacare released a report and recommendations prepared by McKinsey & Co at the government’s request in March 2013.

It cited, among other things, a rushed process that left insufficient time for testing and a focus by officials on getting people enrolled versus making the system work right.

The consequence, it said, could be system failures that could make enrollment slow or at times impossible for consumers, which is exactly what happened.

Questioned about the McKinsey study, White House spokesman Jay Carney said the president had been briefed on it in the spring.