Virginia voters have approved a congressional redistricting plan that could help Democrats win up to four additional U.S. House seats in this year’s midterm elections. Voters passed a constitutional amendment authorizing the unusual mid-decade redistricting. But their vote may not be the final say because the question still faces legal challenges, including before the state Supreme Court. The Virginia referendum is the latest development in a national redistricting battle that began after President Donald Trump urged Texas Republicans to pass a map more favorable to the GOP. Virginia is the second Democratic-led state to back redistricting, after California voters approved a new map last November.