Here's a little stat to remember whenever some idiot brings up the economic benefits of illegal immigrants.

Illegal immigrant households on average pay about $10,000 a year in taxes. At the same time, illegal immigrant households use about $30,000 a year in social services.

So do the math. The figures are from Numbers USA, siting an exhaustive survey by the Heritage Foundation where they analyzed every facet of taxes, from sales tax to tax on Lottery tickets, etc.