And when they are laid off, or drop off to start their own companies, those companies will be based in their home countries instead of in the U.S.
I think this is a great and moral plan to reverse the brain drain the U.S. has been benefiting from at the expense of other countries for decades.
You know, places to look up to.
It's always at the discretion of the immigration officer and there's no recourse if they don't let you in.
Personally, I don't think it's generally reasonable to jail at entry when denying entry is an option. The case where the UK tourist was denied entry to Canada from the US and then was jailed in the US is a case where denying entry isn't really possible, because if neither side of a land border will allow entry, what do uou do... but then it shouldn't have taken more than a couple days to make arrangements for her to fly home on her own dime.