More than 250 Democrats congregated in Fort Worth on Wednesday to celebrate the 60th anniversary of the Voting Rights Act and condemn Texas Republicans’ proposal to redraw the state’s congressional districts.

Texas Republicans have launched efforts to redraw congressional maps to secure more GOP seats in the U.S. House.

The maps achieve a five-seat swing largely by shaving slivers of Republican strongholds from ruby red districts and placing them inside three urban districts.