NBC News runs the scenarios for Democrats going forward.
Not looking very good.
No matter what, Democrats will need to reinforce their decaying state and local party apparatuses to build power outside cities. Conservatives understood the importance of these down-ballot races years ago and have invested heavily in them, while Democrats tended to concentrate on the presidency and interest-group specific causes.
Party leaders seem to have recognized the error and have the new Obama-backed effort to win state legislatures ahead of the next round of redistricting in 2020. If successful, the party will lessen the headwind of Republican gerrymandering, though they will still have their own self-gerrymandering to worry about.
But they'll need to trim the sails on their positions.
What they told Republicans to do, and fortunately Republicans ignored.