In late October, with the caravan on the move, Trump badgered Nielsen almost endlessly. He suggested lining up border agents and other officers to form a sort of human wall along the portion of the southern border that lacked fencing, roughly 1,200 miles of the 1,933-mile border. A statistician at Homeland Security figured out it would take hundreds of thousands of people standing arm to arm to create a line that long. The number, a conservative estimate, was immediately discarded because it was so staggering. “We were like, this is absurd,” one aide remembered.
