Speaking of a wall, this past week was about the fifth time in the last ten years the wife and I have been down to the border. This time in Arizona. We visited Organ Pipe National Monument which is just five miles from the border at its southernmost extent. There were numerous signs advising us to report strange people wandering on foot through the desert. Didn't see any. Just other strange-looking tourists like us.
We drove down right to the border where it said you're entering Mexico and then turned around. No wall there which surprised me. But Border Patrol agents all over the place. Inside and outside of the monument. We got checked going into and out from the monument.
But people should realize that a great pct. of the border abuts uninhabited desert land where without support from people inside the U.S. it would be almost impossible to get anywhere.
I will say I do support a wall where feasible. However, I don't know where most illegals enter the U.S. I suspect most come through the border cities where transportation and help are far more readily available than desolate, desert border areas.