California voters have passed Proposition 50, CBS News projects, approving a measure backed by Gov. Gavin Newsom and legislative Democrats that will redraw the state's congressional districts.

California Republicans filed a federal lawsuit to block Prop 50 maps, alleging racial bias and constitutional violations in redistricting.

The California Republican Party filed a federal lawsuit Wednesday challenging a new state congressional map that is more favorable to Democrats, a day after voters approved a ballot measure that would allow for the temporary use of the map.

Republicans asked a federal court to block newly approved maps in California that were designed to flip as many as five House seats for Democrats.

In a major win for Gov. Gavin Newsom and Democrats, the state can now adopt new maps with more blue-leaning districts.

Five incumbent Republicans must now choose between intraparty warfare or a run in districts designed for Democrats.

California voters are deciding whether to reshape congressional districts in a move by leaders in the nation’s most populous state that could flip some House seats from Republican to Democratic control.