GEIST: What's her biggest regret about the way Syria's been handled?

MOOK: Well, obviously, she's been out of office for some time now.

GEIST: But she was there when it started.

MOOK: Well, right, but, but, uh, you know, she, I, I think she's well regarded for her leadership as secretary of state. She came out of that office with a 70 percent approval rating. In contrast to Donald Trump, she has released a clear and decisive plan to defeat ISIS. Donald Trump has said that he thinks he knows more about it than the generals and refuses to tell us what his secret plan is.

GEIST: I understand, Robby. What about in Syria, though? She supported the drawing of the red line. Obviously, she was out of office when Assad used chemical weapons. Was it a mistake to draw the red line if the president was not willing to go — to do something about it when it was crossed?

MOOK: Well, as you pointed out, the decision regarding that was made after she was out of office, so I think you'd have to ask President Obama —

GEIST: Was she disappointed that the president didn't act when the line was crossed?

MOOK: I think you'd have to ask her about that question, how she would characterize —

GEIST: Well, you're here to speak for her, Robby, so you haven't discussed that at all?

MOOK: She — look, what matters is what she's going to do as president and, as I said, she has a clear plan to defeat ISIS. Donald Trump does not. It's a secret; he won't tell anybody what it is, and he says he knows more about it than the generals. I think the choice for voters is clear.