Senator Graham's frustration with the continued stonewalling about what really happened in Benghazi is completely understandable. Perhaps the White House can't answer that question because they simply don't know. National defense seems to be rather low on the President's scale of priorities because it hemorrhages money from his domestic priorities like immigration and annihilating the Republican Party so there may not have been enough assets on the ground or the channels established to relay such critical information up the line.
Whatever happened that night, Senator Graham is using every tool he can to get at the truth, even if it means standing up to President Obama's White House. And, for that, he is to be commended.