A push by Texas Republicans to redraw congressional maps to secure five more GOP seats in the U.S. House has kicked off a no-holds-barred battle between blue and red states, each threatening to redraw their own House seats.

Texas Republicans are moving forward with an effort to redraw the state’s congressional map to be more favorable for the GOP, prompting states around the country to consider whether they too should revisit their district lines ahead of next year’s midterm elections.