Twenty million of them? I remember the days when Mexicans did come up here for seasonal work, then went home and lived well with their dollars. Then, we were mandated to provide education, healthcare and social services to their families so they brought their families. Then everyone else came for the freebies.
We need to get rid of the law that allows a pregnant illegal woman can come here, have a child and now that child is a U.S. citizen.
I do not believe any other countries have laws like this.