Unthinkable to get employment in USA
I feel like putting my 3 pennies into that conversation.
I am from europe currently in usa for many years, and as you know and from my own observation regardless of profession usa is highly protective about their job market , people who have no green cards have no chance of getting employement. If one is a foreigner and has a green card has still hard time getting employement if there are plenty americans for the jobs.
People face it Americans love Americans born citizens rest is just a slogan.