Congress is not going to fund the construction of Trump's fantasy border wall, but even if they did there won't really be a wall according to Department of Homeland Security Secretary John Kelly.
Kelly spoke to Bloomberg and conceded that building a wall along the Rio Grande river is not an option.
“There are other places where a see-through wall, say a large bollard, if you will, fence, makes a lot of sense,” he said. “There’s places, probably, we won’t build a wall, because it’s across river beds, and we can’t dam up the rivers. And there’s other places that are just so rough — you know, the Big Bend area of Texas, canyons, high ground, low ground. Very little moves through there, anyways. So we are all still committed to a barrier, wall in some in places, in some places see-through wall, but once again, technology, and backed up by CBP.”
The Rio Grande runs over 1,000 miles from New Mexico down the southern border of Texas to the Gulf of Mexico. The river traverses approximately 2/3rds of our southern border, leaving very little land on which to build Trump's fantasy wall.
If you exclude the areas that are prohibitive, you may be left with nothing but the land on which a border fence built during the Bush administration already sits.
Bush's border fence never made a difference. Why would a wall in the same locations?