This is insane. I cannot fathom how I, nor educated and talented people I know, could have possibly stayed in the US back in the day if this requirement had been in place then. Applying for a greencard while working on an H, J or O-class visa is extremely common. Far from a loophole, applying from inside the US is the only reasonable way to apply for a greencard. Depending on the country of origin, there may not even…
It surprises me a lot. You can be a politician making a career on a hatred of immigrants, but your prosperity is bound to the prosperity of USA, so why to destroy it? It cannot be just malevolent, it is plain sheer stupidity. It seems to me even worse than roman elites fighting their civil wars while Rome itself was crumbling. They were in a situation of a tragedy of commons, stupid but understandable. But USA politicians really going against immigration is just something else. You can always look tough on immigrants while not hurting brain drain from all over the world.
There were dumb rumors that Trump is a Kremlin agent, but now I don't think they are so dumb. It is not enough to be a fool to inflict so much damage to USA.