More Mexican Immigrants Leaving the US than Entering

Donald Trump's wall to keep undocumented Mexican immigrants out of the country might have unintended consequences as the flow migrants appears to be changing directions.

Photo by Dawn Paley

For the first time since the 1970's, the number of Mexican immigrants leaving the United States is greater than the number trying to get in, according to a report by the Pew Research Center. Julia Preston, who covers immigration for the New York Times, has the details.