A legal challenge has been filed against Texas's newly enacted congressional map, which plaintiffs claim is an unconstitutional racial gerrymander that dilutes the voting power of communities of color.

The Texas Senate on Saturday approved new congressional maps drawn to help Republicans win as many as five more House seats in next year’s midterm elections.

The lawsuit, filed on behalf of 13 Texas residents, states that the redrawn districts in the new map — which Gov. Greg Abbott says he’ll “swiftly” sign into law — are racially discriminatory and violate voter protection laws.