Earlier quoted context omitted.
He would have to convince the courts that I don't like having a trade deficit with anyone somehow means our trading partners are "placing a burden or disadvantage upon the commerce of the United States by any of the unequal impositions or discriminations aforesaid"
I don't think it requires the courts to agree - just that there's a burden or disadvantage and that it's in the "public interest" which seems like a pretty low bar to make up a story that sounds plausible. i think the idea that a trade deficit is a disadvantage is kinda brain dead, but it's plausible sounding enough to argue in court. throw in unequal tariff rates and it seems like an easier win than the IEEPA's emer…
Eventually the courts have to agree/disagree if someone starts challenging it up the chain.