The US Supreme Court struck down the misuse of the law that the president used to tariff nearly every nation in the world in a 6 to 3 vote. What happens to tariffs already paid, is not clear at this point as the court did not articulate. Nor how fast they stop collecting it.
President has other powers to impose tariffs but those are likely not as easily applied to 200 countries as is currently in place. And at any rate, would take him some time to declare those.
So cautiously good news.