The US birth rate is declining, you can’t argue about the costs of immigrates without weighing up the good that these people do. They pay taxes, contribute to medicaid and our bankrupt social security. These illegal children will be paying your social security.
The crime rate is no higher (even lower) for immigrants than it is for citizens.
http://www.governing.com/topics/public-justice-safety/gov-undocumented-immigrants-crime-pew.html?AMP