Assembly Member David Tangipa, 18 California voters and the California Republican Party are arguing in a federal lawsuit that Prop 50 violates the Constitution.

A group of state Republicans filed a federal lawsuit against Gov. Gavin Newsom and Sec. of State Shirley Weber on Wednesday, arguing the maps are unconstitutional.

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.

A group of California Republicans on Wednesday filed a federal lawsuit challenging the passage of Prop. 50, alleging the redrawing of the congressional districts to favor Democrats is unconstitutional.

Voters in former Republican strongholds are seeing red as their districts turn blue after Gavin Newsom and California’s voters passed Prop 50, paving the way to flip five House seats to the Democrats.

Proposition 50 would allow California Democrats to replace the state’s congressional maps with ones the party hopes will help them to flip five GOP-held seats.

Rep. Ken Calvert said he will run in the redrawn 40th District — which now bleeds into more than half of the representative's current 41st District.