California Republicans filed a federal lawsuit Wednesday seeking to block a newly approved U.S. House map that voters passed as Proposition 50 in Tuesday's election.

The lawsuit, filed in the U.S. District Court for the Central District of California, claims the new map illegally uses race as a factor to favor Hispanic voters and violates the Constitution’s equal protection and voting rights guarantees.

Why It Matters

The measure, backed by Democratic Gov. Gavin Newsom, redraws congressional boundaries in ways analysts say could help Democrats flip as many as five House seats in next year’s midterm elections.

What To Know

The new congressional map will create more Democratic seats in California, potentially neutralizing a Republican-favoring redistricting plan advancing in Texas and

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