If you were being paid to destroy the US this is what it would look like, immigrants built most of the US.
This would be stupid five or ten years ago. Right now however, we have enough tech people in the country for the current job market.
Now the flip side of it is - how will they control the outsourcing that typically comes with the H1B restriction? Every enterprise these days has an India development center (banks, telcos, pharma, big-tech, manufacturing, etc.). If they've had the money, they have established it. They can just scale up the hiring there. On second thoughts that's what they were all doing anyway and saying it was AI.
But I guess with enough coercive force, it just might work with your own populus too.