From the LA Times:
Leo Chavez, a professor of anthropology at UC Irvine, said a similar divide happened after the 1986 immigration overhaul under President Reagan. An estimated half a million people who didn't qualify under Reagan's program are still living in the country without legal status, according to figures provided by the Migration Policy Institute.

For the full story, please visit http://www.latimes.com/local/california/la-me-immigration-left-behind-20141122-story.html#page=1.