Is a border wall along the U.S actually possible?

There is a big river near the border between Mexico and Texas, and a lot of cliffs near the river. Where exactly is the wall between Texas/Mexico going to be? Tthe middle of the Rio Grande? At the river's edge? 100 feet from the river? 100 feet on the other side in Mexico? Plus, there are also national... show more There is a big river near the border between Mexico and Texas, and a lot of cliffs near the river. Where exactly is the wall between Texas/Mexico going to be?

Tthe middle of the Rio Grande? At the river's edge? 100 feet from the river? 100 feet on the other side in Mexico?

Plus, there are also national parks/state parks along the border. Is Trump really going to mess up the state parks?
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