"In an hourlong interview they requested, the officials said one of their biggest mistakes in the disastrous health care rollout last fall was worrying about the wrong thing. They said they focused too much on their ultimately unfounded fear that not enough insurance companies would participate in the health marketplaces and that premium prices would be too high. In turn, they said, they ignored what became the real problem, a website that was virtually inaccessible in its opening days."

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