![\"Canadian](\"https:\/\/www.newsbeep.com\/nz\/wp-content\/uploads\/2026\/08\/canadian-prime-minister-mark-carney-meets-with-us-president-AXFMUYDBFFG3POPLK4SARXQOD4.jpg\")
<\/p>\nIn firing up a trade war with Canada, American president Donald Trump turned to a 96-year-old statute so obscure that many trade lawyers didn\u2019t even know it was still on the books.<\/p>\n
A week ago, Trump invoked Section 338 of the Tariff Act of 1930 to slap a 50% tax on US$20 billion worth of Canadian imports. <\/p>\n
The move prompted dollar-for-dollar retaliation from Ottawa and strained already-tense relations between the neighbours and longtime allies.<\/p>\n
The president\u2019s Section 338 tariff authority has never been used, let alone tested in court. \u201cThis law is literally a blank canvas because it\u2019s never been litigated,\u2019\u2019 said Ryan Majerus, a partner at King & Spalding and a former US trade official.<\/p>\n
So it\u2019s unclear whether Trump\u2019s latest Canada tariffs could survive a legal challenge, and some lawyers argue that the Depression-era law has been rendered obsolete by more recent trade laws.<\/p>\n
<\/p>\n
Canadian Prime Minister Mark Carney meets with US President Donald Trump at the White House. (Source: Associated Press)<\/p>\n
Trump raises law from the dead<\/p>\n
To sanction Canada for allegedly discriminating against US dairy, auto and alcoholic beverage exports this summer, the Trump administration reached back to the Great Depression.<\/p>\n
The 1930 tariff legislation is known as the Smoot-Hawley Act after its congressional sponsors. With the US and world economies in collapse, Congress raised tariffs on hundreds of imports in an attempt to protect American farmers and manufacturers.<\/p>\n
The tariffs are notorious among economists and historians for shutting down world commerce and making the Great Depression worse. <\/p>\n
(Trump, who proudly calls himself \u201cTariff Man,\u2019\u2019 has a different view, arguing that the Smoot-Hawley levies simply came too late to rescue the American economy.)<\/p>\n
Business leaders say confidence is ‘brittle’ as the higher 12.5% import tax lands on an already tough market. (Source: 1News)<\/p>\n
In addition to raising tariffs themselves, lawmakers in 1930 gave the president new power to impose them himself: Section 338 authorises presidential tariffs of up to 50% on imports from countries that have discriminated against US businesses.<\/p>\n
Before Trump, no president had actually used the statute.<\/p>\n
\u201cUntil Trump\u2019s second term, few trade lawyers were aware that Section 338 remained on the books or understood what it did,\u201d legal scholars Peter Harrell and Jennifer Hillman of Georgetown University wrote earlier this month in the libertarian magazine Reason. <\/p>\n
They cite State Department records to show that the US considered using Section 338 in trade disputes \u2013 against Spain in 1932 and against newly Communist China in 1949 \u2013 but never did. <\/p>\n
After the Depression, US policy focused more on using negotiations \u2014 rather than sanctions \u2014 to open foreign markets. So Section 338 sat mouldering in the law books.<\/p>\n
Other laws take hold<\/p>\n
As the years went by, the United States passed new trade laws. <\/p>\n
Some of them ceded to the president tariff power, which the US Constitution originally granted to Congress. <\/p>\n
![\"Canada](\"https:\/\/www.newsbeep.com\/nz\/wp-content\/uploads\/2026\/08\/mark-carney-and-donald-trump-QNTJFXOS6JHHPPN7OTRQ3XVQGI.jpg\")
<\/p>\n
Canada Prime Minister Mark Carney and President Donald Trump hold a press conference at the White House in Washington, DC, October 7, 2025. (Source: Associated Press)<\/p>\n
But the new laws also limited the president\u2019s authority to certain circumstances \u2014 including dealing with national security threats and foreign currency crises \u2014 and required the government to carry out investigations and meet other procedural requirements beforehand.<\/p>\n
\u201cThere is a very strong argument that (Section 338) was superseded,\u2019\u2019 said Sara Albrecht, CEO of the Liberty Justice Centre, a libertarian advocacy group that represented businesses that successfully challenged the earlier Trump tariffs with the Supreme Court.<\/p>\n
If Congress wanted the president to retain Section 338 power, Albrecht asks, why did lawmakers pass the Trade Expansion Act of 1962, which allowed for national security tariffs? And the Trade Act of 1974, which gives the president power to go after other countries\u2019 unfair trade practices?<\/p>\n
Battling over Canada’s dairy market<\/p>\n
Legal experts see other weaknesses in the Section 338 tariffs.<\/p>\n
Harrell and Hillman, for instance, write in Reason that Section 338 only authorises tariffs that \u201coffset\u2019\u2019 the harm that a foreign country\u2019s trade practices do to American companies. <\/p>\n
But in targeting Canada, they note, the Trump administration made no attempt to calculate the dollar amount of damage arising from discrimination against US farmers, automakers and marketers of alcoholic beverages. <\/p>\n
And the US went after Canadian imports unconnected to those trouble spots, including hockey sticks and cement.<\/p>\n
Harrell and Hillman also say that Canada\u2019s protection of its dairy market does not single out US farmers for discrimination; the rules apply to many other Canadian trading partners as well.<\/p>\n
Moreover, the United States agreed to the Canadian system \u2013 in which Canada imposes stiff tariffs on dairy imports that exceed a quota \u2014 in a North America trade pact Trump himself negotiated with Canada and Mexico in his first term. <\/p>\n
Harrell and Hillman write that it is \u201cincongruous, to say the least, for the United States to denounce as discriminatory the very terms it agreed to.\u2019\u2019<\/p>\n
But John Veroneau, former general counsel for the US Trade Representative, said the Section 338 tariffs are straightforward: They are justified when another country discriminates against US imports by taxing them more than it taxes imports from other countries.<\/p>\n
And in a \u201cperverse irony,\u2019\u2019 Veroneau said, Canada did just that when it responded to tariffs Trump imposed on Canadian products last year with its own retaliatory tariffs on US imports. <\/p>\n
\u201cCourts will rightly feel obliged in the face of any challenge (to decide): Are the statutory requirements met or are they not met, however ludicrous the broader context might be,\u2019\u2019 said Veroneau, adjunct professor at the University of Maine Law School.<\/p>\n
Plaintiffs are so far hard to find<\/p>\n
Trump\u2019s other tools to impose his protectionist agenda have already floundered in court. The Supreme Court in February threw out his boldest gambit: invoking a 1977 national security law to hit almost every country on Earth last year with double-digit tariffs.<\/p>\n
When Trump tried to replace the revenue lost to the Supreme Court defeat with a new set of tariffs, a specialised trade court in New York rejected those, too \u2013 though the government was allowed to continue collecting the import taxes while the case works its way through the court system.<\/p>\n
No one has filed a lawsuit challenging the Section 338 tariffs. The Liberty Justice Centre has been looking for businesses willing to sue the government over the levies.<\/p>\n
\u201cI haven\u2019t had a lot of response from plaintiffs,\u2019\u2019 Albrecht said. \u201cAnytime you want to sue the government, it\u2019s a hard proposition.\u2019\u2019<\/p>\n
The Section 338 tariffs on Canada are also far smaller \u2013 just 5% of Canadian imports – than Trump\u2019s 2025 worldwide tariffs, meaning that fewer companies have to pay them and can claim to have been injured by them.<\/p>\n
There\u2019s also a chance, Albrecht said, that the two countries will resume the talks they broke off Aug. 21 and reach a compromise to end a standoff neither country wants. <\/p>\n
\u201cI\u2019m hopeful that somebody blinks, that they come to some agreement and it all goes away,\u2019\u2019 she said.<\/p>\n","protected":false},"excerpt":{"rendered":"In firing up a trade war with Canada, American president Donald Trump turned to a 96-year-old statute so…\n","protected":false},"author":2,"featured_media":584353,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[65,42,43,64,40,38,41,39,66],"class_list":["post-584352","post","type-post","status-publish","format-standard","has-post-thumbnail","category-headlines","tag-donald-trump","tag-headlines","tag-news","tag-north-america","tag-top-news","tag-top-stories","tag-topnews","tag-topstories","tag-us-politics"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/584352","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/comments?post=584352"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/584352\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media\/584353"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media?parent=584352"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/categories?post=584352"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/tags?post=584352"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}