My "specific arguments with what he said" are that he is a bullshitter. Nothing he says is something I would believe. He is the consummate master of "Talking Out Of Your Ass!" He says what he wants to hear. Whether or not what he says is true for everyone else is immaterial.
Now, as far as his checkers-to-chess understanding of tariffs, that is obvious as well. The Chinese have leverage that will beat the USA, and anyone else, in a trade war. Short term and long term. And, if he managed to squeeze some minor prize for his efforts, they're not worth the damage done. I have heard him say that the revenue the government earns from China paying for these tariffs will go to directly to those who were hardest hit by the trade war. Well... WTF was the point of the trade war? Just leave it alone. This is a global economy we live in. It's not 1820, or 1920. Trump is antiquated and he is as vaguely aware of economics as he is everything else that he pretends to be an expert on.
Here is a fine summation of how the man doesn't get it, never has gotten it, and never will get it:
https://www.theatlantic.com/ideas/a...fs-show-he-doesnt-get-how-trade-works/589351/