warning. all but very few of the polls contain any evidence gathered since saturday night's debate. and that, for a lot of voters, may turn critical. but that's where the gop race stands right now. and as you might imagine, the very best team covering politics is in the field. our reporters, our camera crews, our analysts, we have it all covered. and because they're in the news late today, let's start with kristen welker on the clinton effort. kristen, this has happened before when there's been trouble, but the story in the latter half of this day is, there's a potential shake up coming to the clinton campaign, because of the level of frustration with how they're doing. >> that's right, brian, and in fact, there was a similar story a week ago, that there was potentially going to be a shake up within the clinton campaign. rachel maddow had the chance to ask secretary clinton if these reports were true, if there is, in fact, a shake up coming.