U.S. Immigration By The Numbers

Immigration has been a top issue in the presidential campaign so far, so all this week, Here & Now is looking at the U.S. immigration system, starting first with the numbers.

Host Jeremy Hobson talks with Marc Rosenblum, deputy director of the U.S. Immigration Policy Program at the Migration Policy Institute, about immigrants in the U.S. - where they're coming from and how the demographics - and numbers - have changed over the years.