California has revised congressional legislative district boundaries for elections beginning in 2022 by a commission that is hypothetically to be non-political.
The only rule: The federal government stipulates that districts must have nearly equal populations and must not discriminate based on race or ethnicity.
It would be nice if compactness and contiguity were required as in some states but California is ruled by one party and the boundaries gerrymander inordinately.
According to CNN on December 22nd: The Golden State’s redistricting commission approved final maps late Monday night, drawing a total of 52 districts — one fewer than in the past because of slower population growth. Overall the map still favors Democrats, who hold 42 of the state’s current congressional seats, compared to 11 held by Republicans.