No idea who the "Cook Report" is, but they predict a Democratic Wave in 2018.

http://thehill.com/homenews/campaign...-2018-midterms

Elizabeth Warren made a salient point - there's no leadership in the Democratic Party right now, and that's probably OK. It's a grassroots reactive movement.

I have a theory that we're in a longer period of increasingly sizable oscillations in political power, as economic turbulence causes much of the electoral to be very angry, frustrated and ready to pull the trigger for big change, in every cycle.

Republicans are the Party of Trump, and have completely forgotten a hot button issue from just last year - deficits / debt. The less Democrats talk (right now), the more (temporary) power they accumulate.