Republicans' attempts to redraw congressional maps in a bid to leverage votes has been approved by legislators in Texas.

"We’re going to fight fire with fire," California Democratic lawmakers say after Texas House approves new conservative redistricting map.

The gambit has triggered a national redistricting war, with governors of both parties threatening to initiate similar efforts in other states.

Texas lawmakers approved a redistricting map giving Republicans five more U.S. House seats, shifting the delegation to 30–7.