And that is where the Democrats will focus their attention if they're smart. The Pennsylvania Supreme Court struck down congressional districts because they were gerrymandered to benefit Republicans. A court did the same in North Carolina, though that doesn't take effect until the 2020 election. If the Democrats try the same in Wisconsin and Michigan and other states, and if they are successful there as well, then they could switch control of legislatures prior to the 2020 census and also redraw congressional districts.
At the federal level, the Demonrats want to get “rid” of gerrymandering so they can institute ‘independent redistricting boards’ that inevitably draw Demonrat majority districts (see Arizona, which should have a 7R-2D delegation has a 5D-4R one thanks to an “independent board.”). Even more obscene in California where their “independent” board has all but wiped out every Republican officeholder (well, that and epic-level voter fraud).
Rodents in my state of TN — Dem gerrymandered until 2012, never complained once until the GOP finally got control decades after a majority of residents were voting GOP but still getting only a minority of seats, and now they’re saying how terrible it is that the GOP has supermajorities (which ironically were achieved under Dem lines !) and there should be an ‘independent’ board to give them back control.
Given the Democrats just handed the Speakers Gavel back to the most insane, batshit-crazy, divisive woman they possibly could to lead the House of Representatives, all bets are off that the Democrats are "smart" in any way, shape or form.