Apparently, they didn't garner enough sympathy in the US

Or, perhaps, they didn't get the  liberal and undecided  voter base as energized as Soros and the DNC thought they would.

So, apparently, someone pulled the funding for transport and Food and Water and other logistics...

And, oddly, the Migrant Convoy has splintered...with about a third of them turning back, a third staying in shelters along the southern Mexican border, and a third still undecided. 

Probably most of 'em don't wanna continue now that they aren't getting paid without any food/water/sanitation/transport provided...