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.

Governor Gavin Newsom has rallied enough support from local Democratic leaders to plow ahead with a controversial initiative to redraw California’s congressional maps. A key next task: tapping the state’s wealthy to help sell the plan to voters.