there are tens of thousands and even more that competed with citizens on employment. a guy a knew since i was 12, lived in San Fran illegally until he got caught 12 years later...works for cash doesn't pay taxes, not all of them are criminals...but they are still a burden to the economy oppose to what the liberals / democrats claim that they are they help the economy...most of them spend their money in their native land...you want to be a US citizen,,,go to the border and apply for an immigrant status...it's the easiest way, and it filters the garbage...if you're a potential good immigrant that follows the laws, why put yourself among those who do illegal stuff to begin with?