I offer this not as a solution to anything, but simply to humanize the issue. It is about my friend, whom I will call Alex.
Alex is the son of a middle-class Mexican family that couldn't keep it together in their home state south of our border. With too many children to feed, the father entered the US illegally 20 years ago. Ten years ago, when Alex was 18, he followed his father to America legally, on a work visa. When his visa expired, he chose to stay here illegally. When he tells the story, it's clear it was a hard decision. Had Alex returned to Mexico, he would have lost his job working at a cement factory. His father, who was injured and disabled at the same factory five years earlier, returned to Mexico and is no longer able to work. Alex is the sole source of income for his parents.