There's a basic possibility that this horde of tens of thousands is intended to invoke a bloodbath.
The Mexicans didn't do anything citing that they couldn't harm the children being used as human shields.
If they get the bloodbath, they're going to project and say that "Trump killed children!"… They don't want to put culpability on the people who made the decisions for the kids or the Demon/Rats that encouraged them.
Still, they get their sacrifice of children.
Rock and a hard place.
To complicate things… I believe we'd likely have to wait until they cross onto US Soil to do something… right?
Can't wage war on Mexican territory, I'd bet.
So… The left would love to see trains full of children being carted off (to safety) like DER JUDEN but that's a bit much.
But then you have to wonder…
Is anyone (non-friendly) going to be going at the border from the US side?