November Surprise
What if the caravan gets to the southern US border right around the time of the mid-term election?
Oh sure, the Republicans are going to say that's all the proof you need that this is some kind of Left Wing conspiracy engineered to cost the Trump Party votes.
Then again, maybe it's a Right Wing conspiracy designed to get the GOP base all riled up and make sure they show up at the polls..
Any evidence can always be interpreted in such a way that it supports what you already believe.