Has anyone considered that the caravans are the DS answer to the plans to have national guard and military deployed during the elections?
Bring up 15-20k militrary age men so that the national guard and domestic defense is distracted and the rest of the country's defenses are weak. Allows for greater destruction or if the rumors are true a possible secondary invasion by the UN from the north under the pretense that the US is abusing the human rights of the caravan