If we declared an invasion I would say it is no contest that potential enemy combatants should be disarmed. Or more specifically to be considered a peaceful entrant any migrants would need to surrender their arms as a sign of peaceful intent and those arms would be returned on exit or after a sufficient time without commiting a crime. But I find it all a hassle, I say we finish trumps "wall" put some razor wire on it and put some auto guns designed to fire on anyone who reaches the top of the wall shooting down the length of the wall. And declare an invasion, genocide have been committed against us and as a result checkpoints designed to check paper work and ID would be mandated and an inquisition to exterminate traitors and become oversight in government would be created.