President Trump said Monday at a campaign rally in El Paso that, “We’ve actually started a big, big portion of the wall today at a very important location, and it’s going to go up pretty quickly over the next nine months.” He similarly said Tuesday at the White House, “We just started a big, big section of wall on the Rio Grande.” I checked in with agents at the Rio Grande Valley border sector to see if they knew what new “wall” Trump was talking about. They sent me information on construction for new border barrier announced last year. The...