So what's the point of these powers held by state courts if the federal government can overrule them? I know that each state has the authority to enact its own local laws, but only if they do not conflict with federal authority. This, on the other hand, raises the question of Congress, given that members of Congress represent the American people in all states. So how can a local court issue rulings that contradict federal authority in the White House, while Congress does not raise the issue for debate?
The court that gave the judgment is not a state court but a federal court. The U.S. Court of International Trade is a federal court that judges cases on international trade. They handle disputes between trade unions, manufacturers, and government. So they have the power to rùle in this case since it is their jurisdiction.
This is solely a case between the Executive and Judiciary,
the legislature is onlookers for now. Trump administration might be going to the supreme court if they fail to block the tarrif judgement.