Virginia is projected to get a 12th U.S. House seat after the 2020 U.S. census, according to demographers at the University of North Carolina, which portends continued upheaval over the state’s district boundaries. A 12th congressional seat also would raise Virginia’s number of electoral votes to 14, further fueling this swing state’s importance in presidential elections. That would be Virginia’s largest number of electoral votes since it had 15 in the 1860 presidential election. A 12th U.S. House seat would give Virginia its largest congressional delegation since the 1...