As Seth noted earlier, Secretary of State Hillary Clinton began her long-awaited congressional testimony about Benghazi with excuses and an attempt to misdirect the public about what the administration knew about the incident and when it knew it. But while Clinton happily listened to fawning praise from the Democratic members of the Senate committee this morning, she lost her cool when one senator pressed her closely to account for the false story that had been put out in the days following the attack.

Senator Ron Johnson pointed out that accurate information about the assault that would have easily corrected the misconception, promoted by United Nations Ambassador Susan Rice and others, that the attack was merely a protest about a film rather than a terrorist attack was available at the time. Clinton not only refused to answer that question in a straightforward matter, but snapped, “What difference does it make?” about the whole matter of the false account. She then attempted to insinuate that there was still some doubt about the matter.

The answer to her question is clear. An administration that sought, for political purposes, to give the American people the idea that al-Qaeda had been “decimated” and was effectively out of commission had a clear motive during a presidential campaign to mislead the public about Benghazi. The fact that questions are still unanswered about this crime and that Clinton and President Obama seem more interested in burying this story along with the four Americans that died is an outrage that won’t be forgotten.

While Clinton gave, as she has before, lip service to the idea that she took responsibility for the tragedy, throughout her testimony she demonstrated that she regarded the whole idea of accountability as a detail to be shrugged off or pigeonholed along with internal government reports about the matter. Her attitude, when not listening to paeans to her service and frequent trips abroad, seemed to betray her belief that not only were questions about Benghazi unimportant but that she knew the mainstream press would continue to give her a pass for her failures.

The problem here is not just what she considers an irrelevant question from Johnson or a mere “difference of opinion”–as she characterized Senator John McCain’s scathing attack on her record on the issue–but a belief that four dead Americans in Benghazi was really not such an earth-shaking event. Her consistent talking point seemed to be that the committee shouldn’t bother itself trying to find out what happened and why and who was responsible for the mistakes that led to the deaths, but merely to “move on”—to steal a phrase made popular during her husband’s presidency. That’s why she still won’t say who changed the public talking points about Benghazi that led to Rice’s lies and why they were altered.

That’s been the key to understanding the administration’s desire to treat its lies about Benghazi as somehow unworthy of further investigation. In Hillary’s world, lies don’t matter as long as it’s her side telling them. That’s not a standard that she and other Democrats would apply to any Republican. As McCain pointed out, the American people deserve an honest account of events that gets the facts straight.

Senator Rand Paul rightly pointed out that her failure of leadership ought to have led to her dismissal. Saying that the State Department gets lots of cables and she can’t be expected to read them all is not the sort of arrogant answer a Senator Hillary Clinton would have accepted from a Republican administration.

“What difference does it make” is an answer that ought to hang over Hillary Clinton for the rest of her public career. It is just one more indication that what happened after Benghazi in the State Department was akin to a cover up. Should Clinton run for president in 2016, this is a story that won’t go away. Nor should it.