As SCOTUSblog readers are likely aware, tariffs are taxes charged on goods bought from other countries. In February, President Donald Trump imposed dozens of new tariffs. Now the Supreme Court will decide whether he had the legal authority to do so. The stakes in the litigation are enormous. Tariffs are a crucial part of Trump’s agenda, with huge consequences in the United States and throughout the world. Indeed, after the U.S. Court of Appeals for the Federal Circuit struck down most of the tariffs, Trump said that their invalidation “would be a total disaster for the Country” and “would literally...