To be fair, it makes sense that if his…plan… is going to work, he needs to get in it quickly. 4 years isn’t a long period of time and if the country doesn’t recover economically before then the next president will absolutely just undo whatever he did.
Even the midterms are a time limit. If things are bad enough then it would absolutely get people to vote for those that’ll take the power of tariffs back out of the president’s hands and back into congress’s.
It’s actually kind of a big flaw with our system as a whole. Countries like China can do more long-term plans without worrying about silly things like electability. In this case, in theory I think Trump is right to wave our big economic stick around. In reality it won’t work because everyone can just wait for his time to be up. Even if countries negotiate there’s no reason to think they won’t reneg in 5 years.