The only people who think this thought live in the inner city/ metro areas. When you get out of town into the 90 percent of the rest of the continent you will see how underpopulated it really is.
“Although I must admit that 307 million (US population 2009) is way too much for the US.”
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What baffles me, is why that piece of scum Holdren wouldn’t consider the approach of shutting our borders, and getting all illegals out. And then for the next 10 years or so, stop all new immigration into the country. That should take down the numbers quite a bit...