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Partisan gerrymandering is a race to the bottom. Yesterday, Virginia voters narrowly approved (51–49) a constitutional amendment letting the state legislature redraw its congressional map through 2030 — bypassing the bipartisan commission voters created just a few years ago.

@benschneer.bsky.social, @cantstopkevin.bsky.social), developed the **Define-Combine Procedure**. We apply the "you cut, I choose" rule to mapmaking. One party divides the state into twice as many equal-population sub-districts as it needs, and then the other party pairs them into final districts.

Neither side has to trust the other or agree on what "fair" means. Instead, each party's self-interest checks the other's. In simulations on real election data, DCP dramatically shrinks partisan advantage. In Texas, ~90% less swing-seat manipulation vs. single-party control.