That is not an unfair advantage, but protecting their domestic industries for reasons unrelated to the quality of the tech, for example to keep people in active employment, prevent bankruptcies, allow an industry to get up to speed, or a lot of other reasons entirely unrelated to the USA. All of these are valid; any country gets to decide who they want to allow on their markets, and to what conditions.

That is not what Trump has been doing, though. Using tariffs as retaliatory measures? As a threat because he didn’t get to "own" Greenland?

Let’s stop comparing sane political strategies to the actions of a narcissistic madman.