I've frequently discussed this, most often in dejected frustration among friends and colleagues. My wife went through a Ph.D. program in electrical engineering and 90% of her research group were foreign born. As native US citizens ourselves, we did not suffer the desperate living conditions to which Ph.D. students on a half- or quarter-RA subject themselves and their nascent families. But we observed it plenty.<p>Many of her research colleagues were effectively deported (forced out of the United States) after graduation if they could not find a firm willing to sponsor them. Sponsorship is itself an exploitative and extremely costly endeavor. Many small companies cannot afford it.<p>The situation seems to me a travesty from every angle I can conceive.<p>The author of this article paints the situation adequately, but I want to add a few more points:<p>1. Since many of the more xenophobic among us Americans are strongly motivated by national defense, I find it especially important to paint the following picture for their consumption: educating these bright minds in the United States and then sending them packing may in fact exacerbate national defense. Considering how many engineering students arrive to our universities from nations we are fearful of (rightly or not) such as Iran and China, it seems especially naive to educate their brightest to the pinnacle of our ability and then send them home--especially since they want to stay here.<p>Similarly, if your aim is to keep your enemies weak (and again, I'm not saying that's a good or bad thing, just that it may be what the more xenophobic among us desire), then certainly creating a brain drain within their society serves us at their expense.<p>2. A commonplace misguided belief that economics is a zero-sum game may also explain some xenophobia. This colloquially takes the flavor of, "they are taking our jobs." The only way to combat this is through repeating the point that immigration creates jobs. We as Americans are better off having these highly-educated job-makers in America than overseas creating and enriching companies that may end up competing with our own.<p>As a free-marketer, I am not all that motivated by such an "America over everyone else" point of view, but if that IS your point of view, then again you should want these bright people staying here and creating jobs or bettering our firms rather than overseas in the hands of our competition.<p>3. It's quite frankly inhumane in many cases to send these students packing. Even in the relative squalor that they endure living, for example in Los Angeles on mere hundreds of dollars a month, they still want to live here and create a family here. The American dream exists in their eyes. Sometimes I think of those who were sent back and wonder whatever became of them, but I cut those thoughts short because no happiness comes from that.<p>4. Just as a minor point, can you imagine the feeling of being kicked out of the US after earning your Ph.D. here? I imagine it might breed a tinge of America hatred when they get back home.