How much of the river is navigable? Certainly not all 1200 miles.
The Rio Grande is like John Kerry, 6 inches deep and a mile wide at the mouth.
“How much of the river is navigable? Certainly not all 1200 miles.”
Actually not much. Probably a few stretches of a couple of miles or so. But . . .
I’m not so sure that it’s a bad idea. Given the level violence that’s been going on near the border - a bit more fire power on a few strategically placed “coast guard” stations might be a good idea.