Actually, that's from Numbers USA which promotes the approach to not only eliminate illegal immigration but also eliminate all legal immigration as well. They are more of the extreme, hard line measurement- which is why you find them failing a lot of good Conservatives. While they have mellowed out a lot lately, and they are a good resource for the illegal immigration piece, it is important to understand their history. One of their founders was Algore's buddy whose purpose on ending immigration was environmental. You can still find papers on their website promoting eliminating all immigration and even promoting abortion as a population control method to 'save the environment. For example, this.. and this
And what is conservative about importing 200 million people or their children, replacing our culture and electorate?