"The battle for control of the House of Representatives and state legislatures next year may well come down not to who does the campaigning. It's more about who's doing the drawing.
Nearly four years after the 2020 Census and the ensuing redistricting of state legislative and congressional districts, court battles over district lines are still waging. In the case of the House, the new and still-disputed lines have an impact on as many as 13 congressional districts – more than half of the 25 seats the nonpartisan Cook Political Report considers toss-ups next year and more than double the five seats Democrats would need to flip to regain control of the chamber.
And while past fights over gerrymandered districts have been largely contained to state legislators, the current battles have drawn in the courts as well, leading to charges of partisan bias by members of the judicial branch."