California Republican lawmakers filed a lawsuit Tuesday asking the state Supreme Court to block Democrats from moving forward with a plan to redraw the state’s congressional map. Four Republican state lawmakers filed an emergency petition with the California Supreme Court to halt what they describe as state Democrats’ “unconstitutional” plan to rush through the redistricting process.

As Texas hurtles toward a flashpoint on a GOP effort to redraw congressional districts, California Democrats are answering with a plan of their own.