In today's SCOTUS arguments, Chief Justice Roberts questioned why Trump believed he had authority to impose tariffs under a nearly 50-year-old law never before used for that purpose. Tariffs are a form of taxation and “that has always been the core power of Congress,” he said.

In today's SCOTUS arguments, Chief Justice Roberts questioned why Trump believed he had authority to impose tariffs under a nearly 50-year-old law never before used for that purpose. Tariffs are a form of taxation and “that has always been the core power of Congress,” he said.