Moves by Texas Republicans and California Democrats to redraw their U.S. House districts could disrupt a rare partisan balance in American politics.

California voters will decide in a November special election whether to approve a redrawn congressional map designed to help Democrats win five more U.S. House seats next year.

Democrats are arguing that a Republican plan for redrawing districts in Texas to create more winnable U.S. House seats for the GOP is an attack on Black and Hispanic voters.