The USA did a great job with the open-border policy, but the population of foreigners in the USA is going to get to be larger than the American population before we know it. It is okay to let foreigners into our country, but lots of the ones that we are letting in aren't getting jobs and they are living off of welfare and\or social security. This is why so much of our social security money is drying up, if we don't fix this problem, soon enough, we won't have any social security left for the elderly who worked for it.
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