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 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.

Gov. Greg Abbott claimed victory Saturday in a protracted fight over redistricting, hours after lawmakers delivered what he called a “guarantee” of a stronger GOP majority in Congress: new maps that redraw the district lines in hopes of sending more Republicans to Washington.