The lawsuit comes as Newsom seeks a tit-for-tat expansion of California's House delegation to match a redistricting in Texas that would net Republicans five more seats.

Republican state lawmakers argue that Democratic lawmakers violated 30-day disclosure rules in the California Constitution.

"Voters decided to give redistricting powers to the Independent Citizens Redistricting Commission and take it away from politicians drawing their own districts. The gerrymandered maps are exactly why voters don't trust Sacramento politicians.