President Biden took office at the height of modern American protectionism. The trade policy legacy he inherited from the Trump administration puts the United States at a crossroads. Will Biden go down the problematic path of executive overreach like his predecessor, or will he forge a new path? We may not need to wait long to find out. In his first trade action, President Biden reinstated tariffs on aluminum from the United Arab Emirates under Section 232 of the Trade Expansion Act of 1962, which authorizes the president to impose tariffs when a certain product is “being imported into the United States in such quantities or under such circumstances as to threaten to impair national security.” Though infrequently used in the past, Section 232 was a favored trade tool of the Trump administration, which was responsible for nearly a quarter of all Section 232 investigations initiated since 1962. While Congress has constitutional authority over trade policy, Section 232 gives the president broad discretion to enact protectionist measures in the name of national security.