Who will this effect the most? I think Indian H1B visas are abused so I think its India.
In our area there are a lot of people coming from India, but there are also quite a few from China and some from Russia.
I work for an IT company, for me when I went to a physical office, out of 110 staff (non managers) I’d say the H1b and green card were 50 India, 40 Pakistan/Bangladesh, 15 white Americans, and the remainder various, Canadian, Chinese, Vietnamese.
The Indians were upset that the US was putting the Muslims on a fast track from H1b to green card and making the Indians wait longer.
This was an east coast office. We are overrun by them and going to an office is like going to a foreign country. I’d say that 1/3 of upper management is foreign as well. Middle managers, are mostly white Americans from what I see.