Trump’s Expanding Tariff Regime Faces Legal Challenge and Economic Fallout

On September 30, the Court of International Trade will consider a lawsuit filed by the Liberty Justice Center that argues President Donald Trump’s use of Section 301 of the 1974 Trade Act exceeds statutory authority.

CNN

Trump revived and broadened tariff authority after returning to office in January 2025. He first invoked the International Emergency Economic Powers Act (IEEPA) on April 2, 2025, to levy 25 % duties on Canada and later a universal 10 % tariff on most trading partners. After the Supreme Court invalidated the IEEPA tariffs, the administration turned to Section 301, asserting it could target any country for “unreasonable or discriminatory” practices. Senior trade officials who helped draft Section 301—Alan Wolff, Carla Hills, and Warren Maruyama—have warned that the current use stretches the statute beyond its original, country-specific intent.

The Legal Battle Over Trump’s Tariffs: Implications for Canada – IEDM

• U.S. farm exports to China fell from $38.1 billion in 2022 to $8.4 billion in the most recent year, a 78 % decline.

Reason

• American consumers have paid $355 billion in higher tariffs on Chinese goods since 2018.

Fortune Magazine

• The Trade Partnership estimates tariff revenue reached $264 billion last year.

Reason

• Canada’s retaliatory tariffs on U.S. steel, aluminum and farm equipment affect roughly $20 billion of bilateral trade.

Reason

• A September poll found 56 % of Americans and 83 % of Canadians think Trump’s tariffs on Canada are wrong.

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• U.S. Trade Representative Jamieson Greer defended the Section 301 investigation, saying it targets “forced-labor” practices that burden U.S. commerce.

Orange County Register

• Liberty Justice Center’s Sara Albrecht called the tariffs “pretextual.”

CNN

• Canadian Prime Minister Mark Carney mocked the approach and warned of “serious tariffs” if the U.S. escalates.

CNN

• Former trade lawyer Alan Wolff described the broad tariff authority as “offensive” and contrary to Section 301’s original intent.

CNN

• Senate Democrats, including Elizabeth Warren and Bernie Sanders, have demanded refunds for illegal IEEPA duties and questioned the new tariffs’ legality.

WWD

• Republican Senator Susan Collins warned the tariffs underestimate impacts on Maine’s manufacturers and farmers, urging a return to negotiations.

WWD

• The Treasury’s $264 billion revenue estimate contrasts with the Liberty Justice Center’s claim that much of the revenue derives from “unconstitutional levies” still being refunded.

Reason

• While the administration cites “forced-labor” violations as justification, critics argue the investigations were inadequate.

CNN

• “I have a sense of ownership of the statute,” — Alan Wolff, ambassador

CNN

• “The notion that you can write your own tariff against anyone and anybody is offensive,” — Alan Wolff, ambassador

CNN

• “It’s clearly showing a pretextual basis for the tariffs,” — Sara Albrecht, CEO, Liberty Justice Center

CNN

• “Stop doing memes, stop throwing shade, stop trying to be tough,” — Mark Carney, prime minister

CNN

• “Not only does it raise costs across the board, it closes off markets,” — Tim Kennedy, Democratic Congressman

WWD

• The September 30 hearing will decide whether Section 301 can be used for the broad tariff regime.

Reason

• President Trump and Chinese President Xi Jinping are scheduled to meet later this week for a summit that may address tariff reductions.

Politico

• Canadian officials plan to continue retaliatory measures unless the U.S. modifies its approach.

The Legal Battle Over Trump’s Tariffs: Implications for Canada – IEDM