I bet they are are missing a very important part of their calculation. How much they actually give back to the economy. Right now were have 6 million unfilled jobs. It's been that way for over 3 years. The people who come over want nothing more than to be able to live peacefully (at least the vast majority of them), work and have their children educated here. Most all the illegal families have at least one person working, buying goods and paying taxes. Many are doing jobs that Americans won't do like picking and packing our produce. When we educate their children, those children stay and become part of the work force in this country rather than somewhere else.