Earlier quoted context omitted.
Perhaps I'm too optimistic, but I think everything America needs to succeed and grow can be found right here in America. The problem is that it's sometimes cheaper to import foreign labor, or export domestic production.
Einstein, von Braun, Musk, Brin. Immigrants are more than cheap labor. edit just for a bit more diversity: Madeleine Albright, Schwarzenegger, Ang Lee, Tesla, Fermi, Audrey Hepburn, Sataya Nadella, Jerry Yang, Cary Grant... edit 2, correction: Ang Lee's Wikipedia page says he's a resident and not a US citizen. Another alien undercutting US labour like James Cameron and Ridley Scott.
For most of my career, I've watched as shitty body shops stuff unqualified candidates at low rates to "farm" them into more valuable workers. They don't hire onshore workers because they lose the visa leverage and hose many of them with "company town" style bullshit like corporate housing.
I'd love to have the opportunity to pull in some equally unqualified urban and rural high school students whose only prospects are Walmart, truck driving or the army and give them the same opportunity. Many would suck, but many others would flourish and build meaningful careers.