(Commentary) The major party candidates could begin with a discussion about the quiet but consequential slowdown in Virginia’s population growth. Though Virginia isn’t exactly axle-deep in ditch water, it looks increasingly like it’s in a growth rut. According to a study from the University of Virginia’s Weldon Cooper Center, “population growth has slowed significantly across Virginia in recent years, falling below U.S. growth levels to reach the lowest population growth rate since the 1920s.” People are still moving to Virginia. But more people are leaving, going to places like North Carolina...