GOP Rep. Jason Chaffetz, however, says that his classified briefings have included information that convince him more could have been done.
"How is it that we have a man down, in this case four men down and an injured person, and the cavalry never comes over the hill," Chaffetz said.
On the first question, the administration's official review, by what is known as the Accountability Review Board, found a series of State Department bureaucratic failures at several levels, but found no negligence.
"A whitewash," is how Issa describes that analysis.
That process was led by veteran diplomat Thomas Pickering, who has served in both Democratic and Republican administrations.
Pickering defended the integrity of the review in the weeks after its release. He several times, however, canceled scheduled interviews with CNN and ultimately said his attorney had advised him not to speak to the network.
Now, House investigators are pursing documents the review board used in its review and this is likely to be one fall focus.
Former CIA Director Michael Hayden, the retired Air Force general and a veteran of many Washington dramas, said GOP talk of a cover up is "a loaded word."
But he says there is, nearly a year later, a lack of full clarity in determining where the biggest security related mistakes were made.
"This is team ball," Hayden said. "There are a lot of people who now look back and say, 'I should have done that. I could have done that. Maybe I could have prevented this.'"