A cargo ship sits in New York Harbor on Nov. 19, 2025 in New York City.The U.S. Supreme Court on Friday could rule on the legality of President Donald Trump's tariffs, a decision poised to have far-reaching impacts on not only trade policy, but also the U.S. fiscal situation.Though it's not certain that the high court will make its ruling, it has scheduled Friday as a "decision day" for handing down opinions, and there is widespread speculation that the tariff case will come up.At its core, the ruling will ...