United States trading partners are moving into a new era of uncertainty after a federal appeals court ruled that President Donald Trump's "reciprocal" tariffs were illegal.
Judges decided in a 7-4 decision that Trump acted outside of his powers when he invoked emergency authority to set tariffs of "unlimited duration on essentially all goods from essentially all countries in the world," upholding an earlier court ruling.
The ruling will also upset the strategies of trading partners who are currently negotiating with the US since most of them will decide to wait and see what happens legally before proceeding. Trump has stated that the case will ultimately go to the Supreme Court, even though there are several options for appealing the ruling in the interim.
The US Court of Appeals for the Federal Circuit decided that the tariffs will stay until October 14, leaving room for additional appeals.
The case pushed the limits of executive power under the International Emergency Economic Powers Act of 1977. Trump is the first president to use this act to apply tariffs, setting a judicial precedent for executive power. For the time being, at least, the administration seems to have lost this test. The judges dismissed Trump's reading of the statute as it would give unlimited power to the president to generate revenue without Congressional consent.
The majority decision referred to Article 1, Section 8 of the US Constitution, stating that "tariffs are a tax" and that the Constitution leaves the taxing power to Congress. The appeals court reaffirmed the previous judgment of the Court of International Trade, stating: "if the President can declare an emergency to reduce the deficit by increasing taxes in whatever manner he desires, little is left of Congressional power over taxation."
The most recent court decision has two significant consequences. One, the infamous "liberation day" tariffs are illegal. Two, the tariffs will be halted temporarily during pursuit of appeal options. Revenue will continue to be gleaned under the executive orders, and if the tariffs are finally declared illegal, that money might need to be reimbursed.
The ruling does not cover all the tariffs—it does not include sector-specific tariffs, like aluminum and steel tariffs. Other tariffs that have been issued during Trump's first term have already been declared illegal under the rules of the World Trade Organization and are being appealed through the WTO's multilateral system of dispute settlement.
The decision does not reverse the suspension of the de minimis exception, which in the past resulted in global postal disruptions. Yet, if the ruling is sustained, tariffs on low-value products would potentially return to pre-"liberation day" levels, usually to zero.
When Trump initially launched his tariff agenda back in April, trading partners responded with alarm, scrambling to strike agreements. Today, governments might prefer to wait and see what happens in the US legal process, since negotiation would be futile if the tariffs are eventually found to be illegal.
This extended uncertainty is costing businesses. Courts can decide the tariffs illegal and order their removal, but Congress can pass new legislation to reestablish tariffs, or Trump can explore other legal avenues.
If the administration takes its case to the Supreme Court, the central issue might be stretched from tariffs to the general principle of separation of powers in the US Constitution. The appeals court believed that the IEEPA does not support tariffs on the magnitude of the "liberation day" tariffs. Although the act authorizes the president to "regulate […] importation," the court called this power a "wafer-thin reed" on which to base such sweeping authority.
Even though the Supreme Court has previously dismissed such arguments, the ultimate decision will decide if this "wafer-thin reed" becomes a binding precedent. With a six-member conservative majority of justices appointed by Republicans, including three from Trump's initial term, the court has already granted the president immunity in some cases. If it permits these broad and open-ended tariffs, it may draw the US closer to the unprecedented expansion of executive authority.
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