President Donald Trump used a provision of the 1930 Tariff Act of 1930, Section 338, to impose a 50 % duty on $20 billion of Canadian goods, leading Canada to impose matching tariffs and straining bilateral relations. The statute has never been applied and has not been litigated, raising questions about its legality and relevance. Legal scholars say the provision was meant to offset foreign discrimination but the administration has not provided a quantitative assessment of the alleged harm. Because later trade legislation limits presidential tariff authority to specific circumstances and requires investigative procedures, some experts argue that Section 338 may be superseded. The Liberty Justice Center, which previously challenged Trump tariffs, is looking for businesses to bring a lawsuit, but few have responded. The tariffs affect a modest portion of Canadian imports, and the two countries have indicated a willingness to resume talks to resolve the dispute.