. >>> we turn to cbs news elections and surveys director anthony salvanto for more on the trends thatnfluence the midterm election results. anthony, i know you haven't slept. >> nope. >> at all. and you're still tabulating here. but big picture, democrats defied history. how did they do it? >> well, this was a turnout story, first and foremost in my mind, and it was sort of as we expected. the people -- our viewers may remember a couple of weeks ago when we were talking about the effect that turnout could have and republicans were on path to a narrow majority but the house could become, even if younger people especially turned out in force. and what happened, they did. their numbers started approaching the 2018 record levels. there was a particular group, subset, we call it the young and restless, that we were watching. not only did they turn out, but they even shifted a little bit more democratic, almost two-thirds voting for democrats. so, that certainly helped the democrats in a lot of states, a lot of districts. but the other thing it did was it offset in a relative way the impact