Apparently, lots of things.
Check the link if you want the whole story.
Here's the part that interests me:
Immigration, long a pipeline for new talent and brain power, is slumping badly, partly because of a crackdown here at home, partly because other countries got tired of exporting their best and brightest, and decided to offer their local engineers similar benefits and lifestyles (seen Infosys’ stock chart lately? How about Bidu?) Without new talent, ideas and innovation stagnate.
This doesn't compute. The last I heard, we had 300 million people here in the US. Surely some of those are of school age; some are even attending our universities.
Yet we have to import brainpower from third world countries?
Meanwhile, our college students are studying Grievance Studies, Tampon Science, Make-Up-Your-Own History, Leadership, Education for Social Change, and the Soap Opera as an Art Form. In their spare time they practice attending public events and shouting down speakers they don't agree with. When they graduate they are barely fit for retail or working for the government. The truly unemployable go on to attend law school.
On the other side of the world, people who have to study by candlelight are learning medicine, chemistry, physics, and engineering. Having learned something of value to the modern world, they then come here, taking jobs no American will do, because said American is functionally illiterate but chock full of self-esteem.
What's wrong with this picture?