Didn't he just shutdown a Hyundai factory in the US and send the workers back to South Korea?
Yes, there's some background in the article also.
No. He radied them and locked up most. Then he found out they were useful, and let them go back to work. Understandably, they left the US after their "warmest welcome party". In other words, they deported themselves. He didn't.
That's the official plan. But how can it work if they also expell the Mexicans? That creates a huge demand for American workers that will rise their wages, while not having the vocational training. The tariffs make sense if they make sure that Americans are competitive for everything that is consumed in America.
But everything that is exported will be much more expensive. What is the USA going to export that the world cannot buy elsewhere cheaper and produced by better trained workers?
Wishful thinking. Why would that ever work?
European hysteria over Russia ensures that Europe will do whatever the US tells them to because Europeans are terrified of losing US military protection. Don't take my word for it though, as Sabine Weyand, Directorate-General for Trade at the EU commission, explains: "If you didn't hear me say the word 'negotiation'—that's because there wasn't one." The U.S. dictated terms in a "strategic compromise, not an ideal economic solution" that European leaders know will destroy their economies. Europe agreed because it is unable to manage its own security. "We have a land war on the European continent. And we are completely dependent on the United States," so there you have it.
https://www.sz-dossier.de/tiefgaenge/das-waren-keine-verhandlungen-0142c461
There's a similar dynamic at play with Japan and occupied Korea who are terrified of both China and DPRK. Hence, the US can force all the vassals who are militarily dependent on having imperial protection to pay tribute to the empire.