Federal authorities has entered the fray in a legal challenge initiated by California Republicans, aiming to prevent the California's recently passed electoral boundaries.
This legal action, filed in federal court, targets the map supported by the state's Democratic governor, which was created in response to a GOP redistricting effort in Texas.
"California's redistricting scheme constitutes a blatant attempt to seize control that tramples on voting rights and undermines the democratic process," declared the US attorney general.
The Democratic party have expressed confidence that the redistricting plan will survive court challenges.
"These opponents were defeated in the election and they are likely to face defeat in the judicial system," stated a spokesperson for Governor Newsom.
The lawsuit claims that California's map wrongfully utilized race as a factor to significantly advantage Hispanic voters in contravention of the US Constitution.
"Race cannot be used as a substitute to advance political interests, but that is exactly what the state legislature did with the redistricting measure," stated a senior official from the Civil Rights Division.
This courtroom confrontation represents the most significant counterpunch by the Democratic party in the continuing redistricting war that started with Texas and has spread across various parts of the country.
In contrast to elsewhere, where Republican state legislatures have enacted gerrymanders, California's plan required public consent, which it obtained with approximately two-thirds of the vote.
Democrats need to flip just a small number of Republican-held House seats to take control of the House of Representatives in next year's midterm election.
The political group controlling the majority will influence the remaining period of the current administration, deciding if a unified Republican Congress will continue to deliver its agenda or face resistance, investigations and potential additional obstacles.
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