Sure, they're good for his business. Tariffs are generally good for the industries they protect, at the expense of consumers, because prices will rise in that industry. So one industry and it's employees receive protection from foreign competition, but consumers "pay for it" on the backend with higher prices.
That's a one-dimensional view. We are not only consumers. We're also laborers, and citizens of a nation. If every other nation has tariffs, and the U.S. doesn't, then it's not a level playing field and industry and capital will leave, as we have seen. It's important to national security that the U.S. maintains its manufacturing base, and personally, I'd rather pay a little more for American goods if that means the working class doesn't descend into poverty, which is costly in other ways.
