Imagining an extreeeeeme gerrymandered future

Section 2 of the Voting Rights Act prevents states from discriminating by race or color to prevent voting. Legally speaking, it’s the only thing stopping extreme gerrymandering, as described by Nate Cohn and Jonah Smith:

So if the Supreme Court strikes down Section 2, as it is considering, any equally populated House district is fair game, at least as far as federal law is concerned. There would be no federal law that might deter a 38-0 Texas congressional map that unanimously elected Republicans, or a 52-0 map in California with nothing but Democrats.

To be clear, such extreme gerrymanders are unlikely for a host of reasons. But the point isn’t that these two extreme maps are likely; it’s that they might soon be legal. And while states may not go this far, they may nonetheless be tempted to push toward more extreme maps than ever before.

Why does this not seem like an impossible scenario.