We are likely somewhere just over 100 miles by now. It is going to be harder to keep track, as more crews are working simultaneously. We are running between 2 to 3 miles per week, and accelerating. This tsunami of money (and even more is coming) is going to ramp up the pace significantly, so we should be running a mile per day or better by the election.
Carla Provost, the Chief of the US Border Patrol (an authoritative source) was providing weekly updates on her twitter feed (@USBPChief), before the holidays. She has not started back with it, but the last one was as of 20 December 2019.
