(MENAFN) The California Republican Party filed a lawsuit on Wednesday seeking to block new congressional maps approved by voters the previous night, according to reports.

The suit, led by State Assemblyman David Tangipa and 18 co-plaintiffs, claims that Proposition 50 “unconstitutionally gerrymanders districts in violation of the 14th and 15th Amendments” of the U.S. Constitution. The plaintiffs argue that the maps are invalid because they allegedly use voters’ race as a factor in drawing district boundaries.

Proposition 50, supported by California Governor Gavin Newsom, redraws congressional districts to give Democrats an additional five of the state’s 52 House seats. The measure was presented to voters in response to new congressional maps approved by Republican lawmakers in Texas, which created the potential for five extra Republican House seats without a public vote.

The California suit is being handled by Dhillon Law Group, founded by Harmeet Dhillon, who also works for the U.S. Justice Department.

Several Republican-led states, including Ohio, Missouri, and North Carolina, have already redrawn maps this year, boosting GOP representation in the House ahead of next year’s midterm elections. President Donald Trump has publicly encouraged these efforts to help Republicans retain control of Congress, where they currently hold a narrow three-seat majority.

It remains uncertain whether the California lawsuit will succeed, as Republicans were unable to prevent Proposition 50 from reaching the ballot. Democratic leaders have expressed confidence that the new maps will survive any legal challenges.

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