Other states have created independent commissions and required bipartisan votes to redraw legislative and congressional districts. Missouri will be the first to rely on a new mathematical formula to try to engineer “partisan fairness” and “competitiveness” in its state legislative districts; the Legislature will continue drawing the state’s congressional districts.
An Associated Press analysis of the new Missouri formula shows it has the potential to end the Republicans’ supermajorities in the state House and state Senate and move the chambers closer to the more even partisan division that is often reflected in statewide races. But the size of the likely Democratic gains remains uncertain, partly because the formula has never been put to a test.