Those surplus Dem numbers pretty much just come from NY and California, hence the Democrat problem.

With Pelosi and Schumer at the helm, I don't think the party's future looks bright at all. To gerrymander, you need to control statehouses - the GOP controls 35 or so, and it isn't likely to change regardless of Trump - unless the Democrat party changes, and it isn't about to - Pelosi already dug her heels in.

Honestly, the political future seems to be developing into NY/CA vs the rest of the country, and regardless of who "wins" in such a scenario, everyone loses.

For who could be free when every other man's humour might domineer over him? - John Locke (2nd Treatise, sect 57)