I think we should line the US border with walls staggered in such a way to limit sight lines and position electronic countermeasures every mile to prevent drones from flying over and kill cellular signals.
Electronic countermeasures, CCTV, and US air dominance at the southern border would act as force multipliers for the boots on the ground until ICE and the Border Patrol are sufficiently funded and stand at appropriate force levels.
Good point — we need to deal with the drones.
I’ll post my earlier suggestions [refined a little] to ‘all’.