House Bill 4, the redistricting legislation, is the only item on the lawmakers' agenda when they reconvene on Wednesday.

The effort is intended to help the G.O.P. win five more U.S. House seats in the midterm elections. Other states, red and blue, are likely to redraw their own maps.

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