benghazi and the violence that cost four americans their lives, including u.S. Ambassador chris stevens. And what we heard last night reverberating throughout washington today, in a series of... See More
benghazi and the violence that cost four americans their lives, including u.S. Ambassador chris stevens. And what we heard last night reverberating throughout washington today, in a series of questions and challenges. What did the white house know about the danger? And the need for protection? Even secretary of state hillary clinton weighed in. Here's abc's jake tapper. Reporter: The vice president raised eyebrows and some outrage. When asked about the diplomats in libya whose rekwepss for additional security forces fell on deaf ears. They wanted more security there. Well, we weren't told they wanted more security there. We did not know they wanted more security again. Reporter: "We" seemed an interesting pronoun for him to use, given that the very day before the debate, two of those security officers testified before congress about their frustrations with the state department. I asked for 12 agents, his response to that was, "you are asking for the sun, moon and the stars. Reporter: Today, mitt romney seized on biden's comments. When the vice president of the united states directly contradicts the testimony, sworn testimony, of state department officials, american citizens have a right to know just what's GOING ON. Reporter: And the white house attempted to clarify. The vice president was speaking about himself and the president and the white house. He was not referring to the administration. Reporter: Questions about why the obama administration initially seemed to downplay the attack that cost the lives of four americans, including ambassador chris stevens are not going away. Secretary of state hillary clinton today for the first time faced reporters on the issue. To this day, we do not have all the answers. No one in this administration has ever claimed otherwise. Reporter: And the white house continued to point out that many of the same republicans who are questioning the administration's refusal to send more security agents to libya are the same republicans who tried to cut funding for diplomatic security. Diane? All right, jake. And I'll see you this sunday, we'll all be watching, as martha raddatz also joins you there to weigh in on the big debate. Along with vice president biden's son, beau, and governor mitt romney's debate sparring partner, senator rob portman, "this week" this sunday.
This transcript has been automatically generated and may not be 100% accurate.