President Donald Trump has called for Republican states to redraw their U.S. House districts ahead of next year's elections. Now a growing number of both Republican and Democratic states are entering the battle to gerrymander voting maps. Republican-led Ohio is the latest to approve new congressional districts. Democratic lawmakers in Virginia also have taken a step toward redistricting with a proposed constitutional amendment. Republican-led Indiana and Kansas could be next to consider it. Texas, Missouri and North Carolina already have redrawn districts. And California voters are deciding on a new House map. Democrats need to gain just three seats to take control of the House.