Rahm Emmanuel engineered their takeover in ‘06 by recruiting centrist-leaning candidates to run in “red” districts.
This is no longer possible. The Dem Party has radicalized itself to the point that it’s base will never allow them to run such candidates ANYWHERE.
There are no blue dog democrats left to win.. Dems cannot win outside of the geographical regions they already dominate... Urban Centers and the coasts, they have no chance of unseating any reasonable republican.
The only way Democrats win big, is for Republicans to eff up... I definitely see the Senate republicans in particular EFFING up right now... but they will be primaried and taken out Just like Corker and Flake more likely than losing to a Dem in the general.
If anything I think you will see a lot of MAGA candidates show up to challenge sitting Dems in purple districts, bolstered by Trumps win and Bannons willingness to spend to back MAGA candidates.
History says the opposing party gains seats in the Mid Terms...generally.. but I don’t see any groundswell for Dems, and i sure as hell guarantee if they run on a “IMPEACHMENT” platform, they will get absolutely SLAUGHTERED everywhere except the bluest of blue districts.