Eric McGhee, Mike Migurski, and Chris Warshaw posted this new paper comparing the newly enacted congressional and state legislative district plans to their predecessors. The main findings are:
(1) The national House map is substantially fairer but still nontrivially skewed in a Republican direction.
(2) Commission-drawn plans now do much better than politician-drawn plans in terms of partisan fairness. (This was unclear in past cycles.)
(3) Most of the nationwide drop in competitive House districts is attributable to a handful of Republican-drawn plans (GA, IN, TX).
(4) The AL and SC congressional plans stand out for the poor representation they provide to Black voters.