A North Dakota construction magnate, backed by a far-right Steve Bannon-linked foundation, built 3 miles of border wall along the Rio Grande in Texas at no expense to the government.  Then he cashed in his $50 million investment in a $1.7 billion wall building contract.  But his “free gift” wall – even before it was flooded by Hurricane Hanna -- seems to be slipping into the river. Jeremy Schwartz of the Texas Tribune and ProPublica broke the story.