russia investigation the more we realize how much we don't know. the best explanation for where we are was actually made more than 16 years ago. >> reports that say that something hasn't happened are always interesting to me because, as we know, there are known knowns, there are thing we know we know. but we also know there are known unknowns, that is to say, we know there are some things we do not know. but there are also unknown unknowns, the ones we don't know we don't know. >> come on. that's one of the greatest spin lines ever. let's take the lead and let's start with the most important of the known knowns in the russia investigation. here's what we know. 19 people have already been charged with crimes, including the president's former national security adviser, former campaign chairman and two former campaign advisors. we know the trump campaign met with a russian operative in trump tower. we know the dnc and john