"Well, number one, we ought to start enforcing the laws on the books. And number two is we ought to add to those in a way that takes the enforcement route first before we assume that there is some inevitable flow of people that’s unstoppable. I just reject that out-of-hand. [...] It depends if your view is that the United States is a sovereign nation. Then you accept that we ought to be able to decide who gets in and who doesn’t and on what grounds we admit people. And that’s what, if in the light of the fact that there is a mass herd of people who are trying to come across unlawfully—now, if we were to do and take an attrition strategy like the House is trying to do and take border security, interior enforcement and employer sanctions all at once, and make it more difficult for people to get here and get a job, then you would see fewer people trying to come in. But until we do that one part nevertheless has to be having some physical barrier on the border."