The US Justice Department has officially joined a legal challenge initiated by California Republicans, seeking to halt the state's newly approved electoral boundaries.
This court case, submitted to a US district court, targets the map championed by the state's Democratic governor, which was developed in reaction against a Republican-led gerrymander in Texas.
"The state's electoral map represents a blatant attempt to seize control that tramples on civil rights and mocks the electoral system," declared the nation's top law enforcement official.
Democrats have voiced assurance that the redistricting plan will survive legal scrutiny.
"These opponents lost at the ballot box and soon they will also lose in court," commented a representative for the governor.
The lawsuit asserts that California's map improperly used racial considerations to significantly advantage Latino communities in violation of the US Constitution.
"Race cannot be used as a proxy to advance political interests, but that is precisely what the state legislature did with Proposition 50," argued a high-ranking representative from the Civil Rights Division.
The legal battle constitutes the most significant response by the Democratic party in the continuing political battle that started with Texas and has extended to multiple states.
Unlike other states, where Republican state legislatures have enacted gerrymanders, California's plan needed voter approval, which it received with nearly 65% of the vote.
The Democratic party need to gain just a handful of GOP-controlled House seats to take control of the chamber in next year's congressional elections.
The party that holds the majority will influence the final years of the sitting president's term, determining whether a unified Republican Congress will continue to deliver its agenda or face resistance, investigations and potential further challenges.
Elena Vance is a film critic and entertainment journalist with over a decade of experience covering international cinema and industry trends.