http://www.pbs.org/wgbh/pages/frontline ... -enforced/

Does President Obama believe that his aggressive policy in immigration and enforcement has been successful?

The president has said a number of times, he swore an oath to uphold the law. It’s our responsibility to enforce the laws that we’ve got. Congress gives us resources to enforce the laws that we’ve got. But how we do it matters a lot. He’s talked about that as well.

So Congress gives us the resources to remove about 400,000 people a year, but it’s very important that DHS [Department of Homeland Security] has been making strategic judgments about what that means and how we do it. The previous strategy was go after anybody you can find, which doesn’t have a lot of value as a law enforcement strategy...