Why should Trump care? Trump represents the basket of deplorable, not the elites.
Those international elite business people got benefits from setting up shops IN China, not shipping TO China.
Trump's blue collar supporters only care about their OWN jobs, not how much money the capitalists in this country make abroad.
Ignoring the politics, Trump is a textbook narcissist, a sociopath and a pathological liar, these traits are not even up for debate, they are blatantly obvious facts. He says whatever he thinks people want to hear, one does not have to dig hard to find examples of him flat out making stuff up on the spot, or saying completely contradictory things on two different occasions. Even when I agree with something he does I find it embarrassing that someone so crude, crass and self serving has a position as the spokesman for my entire nation. From my perspective somewhere near the center, it seems that people who like him believe in him the same way some believe in a religious deity. To them he can do no wrong and any opposing politician can do no right. When an obvious fault or lie is brought up they will engage in mental gymnastics to justify the behavior or deflect, in ways that only a hardcore conspiracy theorist can compete. Some are quick to jump to the conclusion that all of his supporters are a bunch of racist redneck boobs but personally I tend to view them as victims of a scam. They fell for his con hook line and sinker.
Trump is a fraud, he's a con man, a fake. He's nowhere near as wealthy as he claims, if he were then he would be flaunting it and happy to share his tax returns. Especially since he demanded Obama release his, then promised he would release his own if elected, but then look at the extremes he has taken to keep them under wraps. What is he so keen to hide? There is no other reason than they will show the world that he is a fake. Yes he has an impressive array of assets, but assets are not wealth. My neighborhood is full of people in fancy houses driving fancy cars who are mortgaged to the hilt living far beyond their means and Trump is the same sort on a different scale., I'd bet on it. Now if he does decide to release his tax records like he promised to do and it proves otherwise then I'll change my tune, but so far I'm still waiting.
Now regarding tariffs, in a way I think they are a good idea although not without risks. I don't have any problem at all with China, they are simply producing the goods we ask for and being competitive in price. The problem is that we've become addicted to cheap toys here. Goods are absolutely absurdly cheap, and because everything is so much cheaper people here can't make a living selling or servicing these goods. All this non-essential stuff is so cheap that it makes essential things like land, housing, food and stuff that cannot be outsourced to cheaper places seem much more expensive in comparison. It's not sustainable, we are going to have to get used to paying a lot more for stuff and having a lot less of it, the way it was up into the 90s.