Critics of President Trump’s border wall proposal often maintain that it would be very expensive to build a wall along the full 2,000 mile length of the Mexican border. But a number of authorities maintain that a wall need not be that long. One is Brandon Judd, the head of the union that represents Border Patrol agents. He observed that “We do not need a great wall of the United States. We do not need 2,000 miles of border wall. I will tell you, however, that a wall in strategic locations is absolutely necessary.
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