Israel built a very effective border barrier for 2 million dollars per kilometer, or about 3.2 million dollars per mile.
http://www.jewishvirtuallibrary.org/jsource/Peace/fence.html
The southern US border is about 2,000 miles.
We pissed away a trillion dollars on Obola’s “shovel ready” infrastructure projects, and the only thing that happened was the money disappeared.
Spending 6.4 billion dollars (and Trump can probably beat that) on a border wall would be the best 6.4 billion dollars we ever spent.
Not saying it wouldn’t be money well spent. Just wonder if we have 6 billion in seized assets.