Nah. Just opposed the finances that would be required to make a 8' high concrete wall (before foundation, and before factoring reinforced steel beams to maintain structural integrity (because it will need to be higher than 8') for 2,000 miles of border would cost: $844 BILLION dollars. The price goes up exponentially for the increased height. You want it to be at least 90' high so that any fall from the top is fatal, you want a deep foundation, and you want structural reinforcement.
We simply don't have the money to make that kind of a wall. Anything less is just a waste of money.