The actual history of this decade of gerrymandering is that in 2010 Republicans were able to use anti-Obama tea party energy to capture a bunch of state houses

The actual history of this decade of gerrymandering is that in 2010 Republicans were able to use anti-Obama tea party energy to capture a bunch of state houses right before the census redistricting. Republicans used that opportunity to lock-in control of the House probably until 2020. It's really just an accident of history. If the pattern repeats itself anti-Trump anger could give Democrats control of more state houses and lock in the next decade of redistricting. But democrats have been less ruthless on these kinds of things. For example by bringing up anti gerymandering initiatives like this one right before they gain power. Also I think Republicans seem to have more capacity for playing strategic long moves, for example, outside conservative money funded a California ballot measure a few years ago that made California's redistricting nonpartisan, thus taking away from Democrats the biggest state where they control redistricting, probably taking away 5-10 seats that Democrats could gerymander for themselves next cycle.