It is a good thing the value of US citizenship has come to mean nothing to institutions built by US citizens and dollars.
This professor has never taken a foreign graduate student in spite of receiving hundreds of applications over the years. Call me prejudice, xenophobic, or kook, but to me citizenship has value.
You being a professor, I have a question for you.
I suspect it’s because foreign students have better math skills. To often I’ve seen students treat college as a vocational school. They think it’s better to have “hands on” work. That fine I think, if one is leaving soon. However without learning basic advanced mathematics, beyond the fourth semester of calculus, they are ill prepared for graduate school. What do you think of that idea?