Turns out a 30-foot-tall concrete wall in a floodplain is a dam.
“Mexico Worries That A New Border Wall Will Worsen Flooding” (Morning Edition, NPR)
Rex says: None of the border states want a wall. Trump has no idea. It is a whim. If he didn’t have such great hair I would doubt a lot of his plans. But that hair is great! Mt. Rushmore great. Build that wall !!