I've got an idea. We should put a nuke in the center of the caravan and detonate it. That'll split the caravan into two halves and each one will change trajectory to the left and right of the United States. If you can do it before it reaches Chihuahua, the two halves will miss the US entirely, averting armagedón. It's so crazy it just might work.
To accomplish this on such short notice, we're going to have to recruit Sarah "Drill Baby Drill" Palin and Rick Perry, our nation's foremost energy expert.