And why were they hired?  Because they work CHEAP!  Businesses around the country, especially in the south, rely on these low-paid workers.  Without them the prices of food, housing, and other materials rise significantly.  The republicans talk a big game about locking up the border, but behind the scenes their big business donors are telling them to back off.  We'll see a border wall about the same time we see a new healthcare system.  All talk.