MARTHA MACCALLUM (FOX NEWS ANCHOR): It's interesting, when you look at the collusion side of the equation, you were saying, Trey, that, you know, obstruction is sort of the more fertile ground when it comes to this investigation. However, with regard to collusion, the other side of the equation is pretty rich. I mean, when you start to look at how all of this got laid out -- you know, the collusion, the meetings that happened with Professor Mifsud. Why wasn't he investigated? Why didn't they look into where -- is he western intelligence or is he Russian intelligence? And why was it a gloves-off relationship with Joseph Mifsud? You know, you think about Alexander Downer also, who was putting out these little, you know, sort of feelers for [George] Papadopoulos, for Carter Page along the way. I mean, I would imagine that the folks on your side of the aisle are going to have quite a few questions about that. And perhaps the non-answers from Mueller will speak volumes there.