A U.S. federal court has blocked most of former President Donald Trump's tariffs, ruling that he exceeded his authority under the International Emergency Economic Powers Act. The decision halts the "Liberation Day" tariffs imposed on countries like Canada, Mexico, and China. The White House has filed an appeal, criticizing the ruling as judicial overreach. Markets responded positively to the news, with gains across major indices. The ruling underscores the limits of executive power in trade policy