He was never going to cede that power easily.
In the wake of a Supreme Court ruling that stripped away much of his tariff authority, Donald Trump has turned to an older legal instrument — Section 301 trade investigations — to reconstruct the walls the court dismantled. Australia, which had quietly enjoyed a favoured position among US trading partners, now finds itself singled out with the steepest proposed rate from the forced labour inquiry, a reminder that in the architecture of economic statecraft, advantage is always provisional. The deeper story is not about percentages but about leverage: tariffs as a language of pressure, and every nation now compelled to speak it.
- Australia's tariff rate is set to jump from 10% to 12.5% — the harshest outcome of the forced labour investigation — erasing the competitive edge Australian exporters had held over much of Asia.
- Trump's team is methodically stacking multiple Section 301 investigations on top of one another, meaning the final tariff burden on any given country could far exceed what existed before the Supreme Court intervened.
- Australia has fewer than three weeks to mount a formal defence, with the government arguing it is a world leader on forced labour standards — though insiders acknowledge the real fight lies elsewhere.
- Future investigations into Australia's pharmaceutical pricing scheme and its tech platform regulations are already being signalled, turning the tariff threat into a broad instrument of policy extraction.
- Canberra is moving to leverage its critical minerals reserves as a bargaining chip, but the rules of engagement are shifting faster than any single deal can settle.
Donald Trump had always understood tariffs as leverage — a way to open negotiations by threatening pain. When the US Supreme Court dismantled most of his tariff regime earlier this year, he lost that instrument. He moved quickly to recover it.
The vehicle is Section 301 of US trade law, which allows the administration to launch investigations into foreign trade practices and impose tariffs that are harder for courts to strike down. Trump's top trade official, Jamieson Greer, promised to fast-track eight such investigations simultaneously, including one focused on forced labour. The tariff wall, the message ran, would be rebuilt — just through a different door.
Australia had reason to feel relatively secure after the first wave. When Trump imposed his initial tariffs, Australia received a 10 percent rate — the lowest tier — while major Asian trading partners faced rates as high as 49 percent. That gap was a genuine commercial advantage. The forced labour investigation has now proposed raising Australia's rate to 12.5 percent, the highest to emerge from that particular probe, while more than a dozen other countries remain at 10 percent. In a single administrative move, the advantage evaporated.
The government is pushing back publicly, arguing Australia leads the world on modern slavery and forced labour standards. Trade Minister Don Farrell has spoken directly with Greer. But the forced labour framing may be a prelude. Greer has already flagged future investigations targeting Australia's Pharmaceutical Benefits Scheme and its regulations requiring social media platforms to pay for news — longstanding American grievances now being weaponised through trade law.
The deeper architecture is what trade lawyers are watching. Tariffs from separate investigations are expected to stack — forced labour rates on top of manufacturing overcapacity rates on top of whatever comes next. The cumulative burden on some countries could exceed anything seen under the previous regime.
For Australia, the path forward runs through negotiation. Critical minerals have already emerged as a bargaining chip, and early conversations have taken place at the White House. But the pace is accelerating, and the terms keep shifting. Trump has rebuilt a system in which every country must approach Washington with something to offer — and Australia is now firmly among those doing the approaching.
Donald Trump had discovered something useful about tariffs long before the courts got in his way: they were a tool of leverage. When he was angry at a country or its leader, he could post a threat on Truth Social and watch negotiations begin. Then, in February, the US Supreme Court dismantled most of his tariff regime, and Trump lost that power. He was not going to accept that loss quietly.
Within weeks of the court ruling, Trump and his trade officials announced their plan. They would use a different legal pathway—Section 301 investigations, named for the relevant section of trade law—to justify new tariffs that could survive judicial scrutiny. Jamieson Greer, Trump's top trade official, promised to fast-track these investigations across eight areas, including forced labour. The message was clear: the tariff wall would be rebuilt, just through a different door.
Australia, which had weathered the initial tariff wave relatively well, now faces an unexpected blow. When Trump first imposed tariffs last year, Australia received a 10 percent rate—the lowest available under his scheme. Other major trading partners in Asia faced rates as high as 49 percent. That gap gave Australian exporters a significant advantage. But the forced labour investigation, which examined every country that participated, has produced a proposal to raise Australia's rate to 12.5 percent. That is the highest tariff proposed to emerge from this particular investigation. More than a dozen other countries are facing only 10 percent. In a single move, Australia has lost the competitive edge it held.
The timing is deliberate. Australia has less than three weeks to submit arguments defending itself. The government is already making its case publicly, arguing that it leads the world in addressing forced labour and modern slavery. Trade Minister Don Farrell has spoken directly with Greer about the issue. But everyone involved understands that forced labour is likely to become a secondary concern in what comes next. Greer has already signaled that future investigations will target areas where the US has long-standing grievances with Australia: pharmaceutical pricing practices and what Washington views as discrimination against American technology companies. The Pharmaceutical Benefits Scheme and Australia's push to make social media platforms pay for news content are both potential targets.
This is not random. Trump's administration is methodically rebuilding the tariff structure that existed before the court intervened. A second Section 301 investigation is already underway, examining manufacturing overcapacity. Only 16 countries are being investigated in that probe, mostly in Asia, and Australia is not among them. But the real architecture becomes visible when you consider how these investigations interact. Trade lawyers expect the tariffs from different investigations to stack on top of each other—the forced labour tariffs plus the overcapacity tariffs plus any future investigations into pharmaceuticals or tech regulation. Some countries could end up facing substantially higher combined rates than they did under the previous regime.
For Australia, the calculus is shifting. It may eventually regain some of the competitive advantage it enjoyed before, but only if it plays the negotiation game skillfully. Australia has already begun using its abundant critical minerals as a bargaining chip, and some early deal-making has occurred at the White House. But the rules are changing, and the game is accelerating. Trump understands that tariffs do more than raise revenue or revitalize manufacturing. They damage the economies of countries dependent on US trade, which gives him leverage to extract concessions. Every country now faces pressure to approach the White House with offers, to negotiate, to make deals. Australia will be among them, watching closely to see which investigations come next and what they might cost.
Citações Notáveis
Other alternatives will now be used to replace the tariffs that the court incorrectly rejected. We have alternatives. Great alternatives.— Donald Trump, after the Supreme Court ruling
The administration was clear immediately after the Supreme Court ruling that it would be looking for continuity in tariff policy.— Patrick Childress, trade lawyer
A Conversa do Hearth Outra perspectiva sobre a história
Why did the Supreme Court decision in February matter so much? Couldn't Trump just impose tariffs anyway?
The court blocked most of his tariffs on constitutional grounds. He lost his primary tool for leverage overnight. So he pivoted to a legal mechanism—Section 301 investigations—that produces tariff justifications the courts are much less likely to strike down.
But Australia was already hit with tariffs last year. Why is this forced labour investigation singling it out for a higher rate?
That's the puzzle. Australia wasn't singled out—every country investigated faced adverse findings. But the tariff rates proposed are different. Australia got the lowest rate before, 10 percent, which gave it a real advantage. Now it's 12.5 percent, the highest in this batch. It's lost that edge.
Is the forced labour issue genuine, or is it just cover for something else?
The investigation is real, but it's also a vehicle. Trump's officials have already flagged that future investigations will target pharmaceutical pricing and tech regulation—areas where the US has long complained about Australian policy. The forced labour investigation is the opening move.
What can Australia actually do in three weeks?
Submit arguments, make its case about leading on modern slavery, negotiate directly with Greer. But everyone knows the real conversation will be about what Australia can offer—critical minerals, trade concessions, regulatory changes—to avoid or reduce the tariffs.
Could these tariffs stack on top of each other?
That's what trade lawyers expect. The forced labour tariffs, the overcapacity tariffs from the second investigation, and any future tariffs from investigations into pharmaceuticals or tech—they could all apply to the same goods. Some countries could end up paying far more than they did before the court ruling.
So Trump is rebuilding the same tariff wall, just using a different legal strategy?
Exactly. The Supreme Court knocked down his original approach. He's using Section 301 investigations to achieve the same outcome—a tariff regime that gives him leverage to negotiate deals with countries that depend on US trade.