In what way?
Are you kidding me? Trump knows what "comparative advantage" is and takes advantage of it at every opportunity. Trump buys all kinds of "stuff" from China BECAUSE they have a comparative advantage in the production of "stuff". Yet the writer claims Trump is "complete(ly) ignorant" of comparative advantage. I could tear apart just about every paragraph that follows.
You can criticize Trump for a lot of things but claiming he is ignorant of economics is ridiculous.