I think the government is considering the enormous cost to deport illegal immigrants back to Mexico. I've heard there are 7 million or more living in the U.S. illegally. 5 years ago, I had never seen a Mexican where I live but now I see them often. Farmers plant huge fields of tomatoes and the Mexicans pick the tomatoes.
I'm just guessing but I think there are a lot more then 7 million illegal immigrants in the U.S.
I think the solution would be to make it possible for Mexicans to get work Visas and work legally.