They didn't come from Mexico(assuming that is what you meant). They were bussed in from various areas of South America. And I think WE payed for the buses and the gas. I'm sure we payed for the cooperation of at least one of the Drug Cartels/Border Gangs/local police.
Then some of them were flown from Texas to Arizona. We paid for that too.
I bet for every one coming from somewhere other than Mexico, 2 or 3 or 4 are coming from Mexico. Mexico out “migrates” every other countries citizens every day of the week even before this.
What I am wondering is what Mexicans who are already established here think of this. I would think they probably don’t like it. Why? They’re trying to work here too. when they came here it was no cake walk across the border on a bus with a free meal and a warm bed waiting for them. And finally, mexicans are not too fond of their neighbors to the south. And I think for all those reasons we know why Hillary deliberately left them out of her comment. Oh and because she wants the Mexicans here to vote for her :)