The timeline is tightening as states attempt to redraw U.S. House districts ahead of the November midterm elections. Voters in Virginia on Tuesday approved a constitutional amendment authorizing new congressional districts that could help Democrats win additional seats. Next up could be Florida, where lawmakers are to start a special session on redistricting next week. Redistricting usually happens once a decade. But President Donald Trump sparked a mid-decade redistricting battle last year while calling on Texas Republicans to redraw their districts for partisan advantage. California Democrats reciprocated, and other states soon followed. The back-and-forth battle now is about even between the parties.