They asked him about the failed tests in the days leading up to the launch, he referred them to HHS:

Asked him about decision to bring on Jeff Zients to help fix the problems, he referred them to HHS:

Asked him about the costs associated with fixing the site, he referred them to HHS:

Asked about the “tech surge,” referred them to HHS:

And finally, he bolts the briefing room before they could ask him another question that he would have inevitably referred back to HHS: